Aluminum Mailboxes

Established in 1936, Salsbury Industries is the industry leader in manufacturing and distributing commercial and residential mailboxes. Our warehouses are filled with inventory and most standard orders ship within 1 to 2 days from the time the order is received. Whether you are building a mail center or buying a single mailbox for your home, Salsbury Industries is your one-stop source. Thank you for visiting us at mailboxes.com.

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Certainly. Click here to Request a free catalog.

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Absolutely. For volume purchases, click here to Request a free quotation.

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ISO 9001:2015 is an internationally agreed upon standard that describes a system by which a company can demonstrate their commitment to product quality in all of their activities. Quality must be built into a product by the use of a management system that assures all activities associated with product quality are appropriately managed and controlled. If a company successfully completes an audit by an ISO-accredited third party auditing company, then ISO 9001:2015 certification is awarded. Salsbury Industries is an ISO 9001:2015 certified company.

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Use our Search. It is on the top right of every web page - just enter an item name, a keyword or an item number from a Salsbury Industries catalog and click the red Search button. You can also find products by selecting one of our major categories 'Commercial Mailboxes' for USPS Access, ‘Commercial Mailboxes’ for Private Access, 'Residential Mailboxes' and 'Signage'.

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The Salsbury Standard Cluster Mailbox and Regency® Decorative CBU Type I, Type II, Type III, Type IV, Type V, Type VI and Outdoor Parcel Lockers (OPL's) are all licensed and approved by the U. S. Postal Service. Ideal for commercial buildings, multi-family housing units, apartment complexes, government and military bases, schools, colleges and other residential and commercial developments, cluster mailboxes are ultra-durable and provide a secure means of receiving mail and packages. When you install your Cluster Mailbox the local post office will install an "Arrow Lock." This lock is used for the local post master to open the unit and deliver the mail. When the U.S. Postal Service delivers a package to the parcel locker, a parcel locker key is placed in the recipient's mailbox. Once the recipient opens the parcel locker, the key is automatically retained in the lock until it is removed with the USPS control key.

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The United States Postal Service addressed the shape of mailbox compartments and the demand for more secure mail and parcel delivery with a new standard, USPS-STD-4C. This standard replaces the traditional cube style compartments with more flat style compartments as well as incorporates fully integrated or stand-alone parcel locker options into the mailbox. A minimum of one parcel locker is required for every five (5) tenant compartments. Parcel lockers are not required in installation sites with less than five (5) tenant compartments. Salsbury Industries 3700 series 4C standard and custom high security horizontal mailboxes and fully integrated and stand-alone parcel lockers have been USPS approved and meet the specifications of USPS-STD-4C. This standard requires that 4C horizontal mailboxes and parcel lockers be installed in all new construction projects and major remodels effective October 2006.

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The demand for improved mailbox security prompted the United States Postal Service to develop this standard. This standard requires manufacturers to strengthen and improve the master door (arrow lock compartment) on vertical style apartment house mail receptacles (3500 series) and horizontal style apartment house mail receptacles (3600 series). All Salsbury Industries 3500 and 3600 series mailboxes are USPS approved and in full compliance with the requirements of USPS-STD-4B . These 4B vertical and 4B horizontal mailboxes are approved for replacement and/or retrofit installations effective October 2006. For new construction or major remodels, 4C horizontal mailboxes (3700 series) are required.

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Just start shopping! When you find something you like, click the ADD TO CART button next to that item. It will be saved in your Shopping Cart until you are ready to check out. You will have plenty of time to review and change your order before you submit it. When you check out, you will have the opportunity to register which will create a mailboxes.com account or you can use our simple 'Guest Checkout' procedure for a one time transaction. Either way, your personal information and transactions are secure.

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Absolutely. All information you transmit to Salsbury Industries is protected with the most advanced security measures available. Or if you prefer, you can browse our on-line catalog and make your selections, then simply phone your order to 1-800-624-5269 or fax it to 1-800-624-5299 or mail it to 18300 Central Ave, Carson, CA 90746.

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We accept Visa, MasterCard, American Express and Discover.

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We accept PayPal as a method of payment for web orders only.

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Sales tax is applied to orders shipped to California and Washington addresses only.

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Yes, we welcome international orders.

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Registering takes only minutes and is absolutely free. The benefits of membership are plentiful and include quick and efficient check out, on-line order tracking, order status and history, your personalized address book and information on exciting news and specials at Salsbury Industries. Register today - you will be glad you did. Click here to register.

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Salsbury Industries offers a wide variety of USPS approved Cluster Mailboxes to accommodate your centralized mail delivery needs. You can order online at www.mailboxes.com or call toll free – 1-800-MAILBOX.

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All mailboxes must be approved by the United States Postal Service for USPS delivery. Salsbury mailboxes are USPS approved and meet or exceed US Postal Service requirements and specifications. Visit this page to learn more about USPS mailbox requirements and specifications.

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If your mailbox is USPS approved, it will have a label or marking that says, “Approved by the Postmaster General” or “Approved by the U.S. Postal Service”.

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Centralized mail delivery is a delivery system in which the U.S. Postal Service mail carrier delivers mail for multiple residences at one central location.

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A commercial mailbox is a type of mailbox that allows a mail carrier to deliver mail to multiple tenants in one centralized location. Cluster mailboxes and 4C horizontal mailboxes are the most popular types of commercial mailboxes.

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Salsbury Industries carries a complete line of USPS approved commercial mailboxes. Commercial mailboxes for USPS delivery include cluster box units, 4C horizontal mailboxes, 4B horizontal mailboxes, 4B vertical mailboxes, and several additional products. Check them out here.

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The July 2020 edition of the U.S. Postal Service’s National Delivery Planning Standards included a Guide for Builders and Developers.

• All new or remodeled apartment buildings must install USPS approved 4C centralized mailbox equipment. 4B horizontal mailboxes and 4B vertical mailboxes are to be used for retrofit applications
• 1 parcel locker is required for every 5 mailbox compartments
• Mailboxes and parcel lockers in apartment buildings must be placed reasonably close to the entrance in vestibules, halls, or lobbies. The mail carrier also needs to be able to service the mailboxes without interference from swinging or open doors
• The Postal Service may authorize the installation of approved 4C mailboxes in exterior walls of buildings as long as they are not installed directly on the street or a public sidewalk.

For more information, visit our United States Postal Service Mailbox Regulations and Specifications page.

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Out of all the mailboxes designed for multi-tenant centralized outdoor mail delivery, the cluster box unit (CBU) is the most popular. Salsbury’s durable and corrosion-resistant CBU’s are constructed of heavy-duty aluminum and stainless steel hardware with a powder coated finish that will stand up well to harsh weather conditions. One compartment in each Salsbury cluster mailbox is labeled “Outgoing Mail” and includes a weather protection flap.

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Mailboxes.com has many USPS approved commercial mailboxes available for purchase. You will find ample information about each mailbox’s features, options, installation instructions, and more on each mailbox’s product page that will help you select the perfect mailbox to suit your needs. You can also use our website’s Live Chat feature to discuss any questions you have with a customer service representative or view our summary sheet here for assistance in selecting the right USPS commercial mailbox for your application.

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4C horizontal mailboxes are designed for higher security and are required for new construction and major renovations. 4B horizontal mailboxes and 4B vertical mailboxes are for direct one-to-one replacements. 4B horizontal and 4B vertical mailboxes are permitted for replacement use if no significant changes are required to the rough wall opening where the existing wall-mounted mailboxes are currently installed (though you should always check with your local Post Office to be sure). If that isn’t the case, 4C mailboxes must be used.

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A parcel locker is a lockable compartment designed to hold packages that will not fit in a standard mailbox. Parcel Lockers can be independent units or integrated into Cluster Box Units or 4C horizontal mailboxes.

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When a U.S. postal mail carrier is unable to fit a package into a standard mailbox compartment, they will place your package in a parcel locker. The carrier will then leave a key to the open parcel locker in your mailbox.

To get your package out of the parcel locker, you simply need to use the key the mail carrier has left in your mailbox to unlock the parcel locker. The key will have a tag that indicates which locker contains your package. Once you have unlocked the parcel locker and retrieved your package, the key capture system will secure the parcel locker key in place so that it can’t be removed. Only a U.S. postal mail carrier will be able to remove the key with a master key. If you’re still unsure of how parcel lockers work, consult this helpful video.

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An arrow lock is a lock used by the USPS so that mail carriers can have access to commercial mailboxes and can deliver mail. This type of lock is also referred to as a “Master Access Postal Lock”.

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To obtain a USPS approved arrow lock, you will need to contact your local post office branch. Then you can arrange for United States postal personnel to come and install the lock for you.

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Mail carriers employed by the U.S. Postal Service deliver to USPS approved mailboxes.

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Salsbury Industries manufactures USPS STD-4C horizontal mailboxes that are ideal for indoor use. 4B horizontal mailboxes and 4B vertical mailboxes can be only used for indoor retrofit and replacement applications.

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You can use Salsbury Industries’ Mailbox Configurator to help you determine the ideal number of mailboxes and parcel lockers required based on your specific needs. The mailbox configurator will also allow you to create detailed layouts for your mailbox project. Check it out here.

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A PO box is a lockable mailbox located at a U.S. post office while a private mailbox has a street address and a private individual (non-USPS employee) delivers the mail.

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If it is a private commercial mailbox you can, but if a USPS mail carrier will be delivering your mail, you need to make sure it meets USPS requirements.

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A private mailbox is a mailbox that is serviced by a non-USPS employee. Private mailboxes are commonly used in universities, colleges, commercial buildings, private postal centers, military bases, government agencies, and several other applications.

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Private individuals (non-USPS employees) deliver to private mailboxes.

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No, the USPS does not deliver to private mailboxes. Only non-USPS employees deliver to private mailboxes.

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Products with a USPS access listing can be accessed by the USPS with an arrow lock and key. These products are designed to accept a USPS Arrow Lock for master access to the units. Products with a Private Access listing are not to be accessed by the USPS. Instead, a non-USPS employee accesses the mailbox and then distributes the mail.

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Yes, residential mailboxes for curbside delivery need to be approved by the USPS. They will have a marking that says “Approved by the Postmaster General”. However, every local post office is different and may have different requirements. You should check with your local post office to be sure.

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Here are the USPS Mailbox Height Guidelines for installing residential mailboxes:

• Curbside and roadside mailboxes must be easily accessible to the mail carrier
• By USPS regulatory standards, your mailbox should be 41” to 45” from the ground or street surface and up to the inside floor of the mailbox
• Your mailbox door should be set 6” to 8” back from the front face of the curb or the edge of the road. If you do not have a raised curb remember to contact your local postmaster for proper guidance

These regulations also apply to Post Mounted Mailboxes and Locking Mailboxes. Here are the USPS regulations for Locking Mailboxes:

• Do not rely on USPS carriers to open locked mailboxes as they do not accept mailbox keys
• The slots for the incoming mail must be a minimum of 1.75 inches high by 10 inches wide
• Slots on locking mailboxes must be able to hold the resident’s daily volume of mail
• The slots must be large enough to accommodate any unfolded USPS Priority Envelopes

For more information, visit our United States Postal Service Mailbox Regulations and Specifications page.

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According to the U.S. Postal service’s USPS-STD-7C directive, residential mailboxes must accommodate mail 7 inches high by 13 inches wide by 16 inches deep.

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Commercial mailboxes are often used for businesses and multifamily housing complexes and accommodate mail for a large number of recipients in one centralized location. Residential mailboxes are generally standard mailboxes that many homes have and typically have a single compartment that accommodates mail for the members of just one household.

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Centralized mail delivery is a mail delivery system in which the mail carrier delivers mail for multiple residences at one central location.

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Some popular features of residential mailboxes include an aluminum body, a full-width stainless steel hinge allowing for smooth operation, a durable powder coated finish, locking doors, red signal flag and custom vinyl numbers/letters. Salsbury Industries offers all these features and more.  Learn more

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USPS approved residential mailboxes must seal when closed, which protects the mail from moisture. Salsbury Industries residential mailboxes are USPS approved and made of durable materials like aluminum and stainless steel that will stand up well to harsh weather conditions.

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Yes, Salsbury Industries offers locking residential mailboxes for individuals looking for added security for their mail delivery. Check them out here.

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Cell phone lockers are lockable units that keep electronics and other small valuable items safe and secure when not in use. They are accessed by key or combination locks and help to cut down on distraction in schools, offices, warehouses, retail locations, manufacturing facilities, and other locations where people store their belongings.

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Recessed mounted refers to units that fit into a rough opening and are secured with mounting hardware through the back or side panels. Surface mounted refers to units that mount directly to a wall surface. Recessed mounted or surface mounted units are ideal for dance studios, middle school and high school classrooms, health clubs, gyms, and government buildings. The better choice will depend upon each locations construction needs.

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Cell phone lockers are lockable units that keep electronics and other small valuable items safe and secure when not in use. They help to cut down on distraction in schools, offices, warehouses, retail locations, manufacturing facilities, and other locations where people store their belongings.

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Salsbury cell phone lockers cost between $1,380 and $3,960.

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Salsbury cell phone lockers are able to fit tablets with units that have the larger “B” size doors (13” W x 5-1/4” H). The product description will tell you if a unit has “B” doors or if it has the smaller standard “A” size doors (6-1/2” W x 5-1/4” H).

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Options including keyed locks, combination locks and resettable locks are available for Salsbury cell phone lockers.

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Yes, Salsbury cell phone lockers include a master key to access all the compartments via the front panel lock. Master keyed locks also allow access to all individual compartments with a master control key. Additionally, a master control key is included with combination and resettable locks to override any individual combination.

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Yes, Salsbury Industries offers custom cell phone lockers. They come in a wide array of colors and configurations and are available in four different locker door sizes. Click here for more information.

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Click here for clear, easy-to-follow installation instructions for both surface mounted and recessed mounted cell phone lockers.

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Yes, Salsbury Industries carries 19900 series free-standing cell phone locker enclosures which are designed to accommodate Salsbury 19100 series recessed mounted cell phone locker units. Check them out here.

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The discounted products will be removed from web specials once they are no longer in stock.

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No, there is no limit to how many products you can buy on web specials. As long as the item is in stock, you can purchase it. Check out our web specials here.

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The web specials products are often times items that are being discontinued so Salsbury Industries may not have replacement parts depending on the product.

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Yes, a USPS mail carrier has access to USPS approved apartment mailboxes so they can provide mail delivery.

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Apartment mailboxes are available in a variety of sizes depending on the application. Click here to view information on selecting the right apartment mailbox for your application.

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A United States postal worker has a master key to a USPS supplied Arrow Lock that allows them to access all compartments in a locked apartment mailbox at once.

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The USPS will deliver to apartment mailbox compartments as long as the mailbox is USPS approved.

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According to USPS regulations, the property owners, builders, or developers are responsible for apartment mailboxes. The USPS’s Postal Operations Manual states, “Purchase, installation, and maintenance of mail receptacles are the responsibility of the customer.” The USPS is responsible for your mail.

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The USPS requirements for your apartment mailboxes will depend on what type of mailboxes you choose. This page provides information on USPS mailbox regulations and specifications for various types of apartment mailboxes.

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Centralized mail delivery is a mail delivery system in which the mail carrier delivers mail for multiple residences at one central location.

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4C horizontal mailboxes, cluster box units (CBU’s), 4B vertical mailboxes, and 4B horizontal mailboxes can all be used for apartments. Click here to view information in selecting the right apartment mailbox for your application.

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Salsbury Industries carries a complete line of USPS approved apartment mailboxes. Most items are in stock so you can get them right away to complete your project. Check them out here.

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Salsbury apartment mailboxes come in a variety of styles and colors that can enhance the look of your apartment complex. You can also customize the mailbox’s engraved placards and doors. Our elegant Regency Decorative CBU’s will add a touch of class to your community. Check them out here.

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Salsbury Industries carries a wide variety of mailboxes for colleges and schools that come in many sizes. Individual door sizes are as small as 3 ½” W x 5 ½” H and as large as 12 ¾ ” W x 13 ¾” H.

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4C horizontal mailboxes, 4B horizontal mailboxes and 2200 Series aluminum mailboxes are popular choices for college mailrooms because they can be manufactured with keyed locks or combination locks to meet the needs of mailroom personnel and/or students. They are available in many different sizes and can accommodate a large number of students.

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Salsbury Industries carries a complete line of mailboxes for colleges and schools. Most items are in stock so you can get them right away to complete your project. Check them out here.

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Salsbury Industries has combination and standard keyed locks available for college mailboxes.

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Depending on whether the college or university has a private mailbox system, the mail will be delivered by either a USPS mail carrier or a non-USPS employee if it is a private mailbox.

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Mailboxes can be made of several different materials, but the most common options are plastic, wood, steel, and aluminum. Salsbury mailboxes are primarily made of aluminum.

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Salsbury Roadside Mailboxes include a lock with two keys on both a front and rear door. They are USPS approved and made entirely of heavy-duty aluminum. Check them out here.

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Prices for Salsbury residential mailboxes vary depending on your needs. Generally, standard residential mailboxes cost between $100 and $225.

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Salsbury Industries offers a wide variety of post mounted mailboxes and locking mailboxes for home curbside delivery. Check them out here.

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USPS standards require that residential mailboxes are sealed when closed, which prevents water from getting inside. All Salsbury curbside residential mailboxes are USPS approved.

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The installation instructions for your residential mailbox will vary depending on the mailbox you select. Salsbury Industries includes detailed, easy-to-follow installation instructions with all its mailboxes—just scroll to the bottom of the product page and click “Installation Instructions” under “Downloads”. You can also find installation instructions for residential mailboxes here.

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USPS standards require that residential mailboxes are sealed when closed, which prevents water from getting inside. All Salsbury curbside residential mailboxes are USPS approved.

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The installation instructions for your residential mailbox will vary depending on the mailbox you select. Salsbury Industries includes detailed, easy-to-follow installation instructions with all its mailboxes—just scroll to the bottom of the product page and click “Installation Instructions” under “Downloads”. You can also find installation instructions for residential mailboxes here.

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Cluster Box Units (CBU’s) or USPS STD-4C horizontal mailboxes are USPS approved products for centralized mail delivery. They are required for new construction and major renovations.

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If your mailbox is USPS approved, it will have markings that say, “Approved by the U.S. Postal Service” or “Approved by the Postmaster General”.

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If the USPS is delivering your mail, the post office must approve mailboxes for new construction. You should verify with them which kind of mailbox is approved for your location. Click here to view information in selecting the right mailbox for your project.

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You will have to notify your local post office that you purchased a new mailbox so they can deliver the mail. They will then set an appointment to install a USPS supplied arrow lock for future USPS mail delivery.

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The USPS mail carrier may refuse to deliver the mail until a mailbox is installed. If you don’t have a mailbox and aren’t receiving your mail, you should contact your local post office.

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A parcel locker is a lockable compartment designed to hold packages that will not fit in a standard mailbox. Parcel Lockers are integrated into Cluster Box Units and 4C horizontal mailboxes. They are also available as independent units to compliment a mailbox installation.

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Commercial mailboxes are mailboxes that are designed to service multiple tenants where the USPS will be delivering the mail to each bank of mailboxes.

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The installation instructions for your commercial mailbox will vary depending on the mailbox system you select. Salsbury Industries includes detailed, easy-to-follow installation instructions with all its mailboxes—just scroll to the bottom of the product page and click “Installation Instructions” under “Downloads”. You can also find installation instructions for commercial mailboxes here.

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The Maximum Height Recessed Mounted 4C Horizontal Mailbox with 20 Doors and 2 Parcel Lockers with USPS Access - Front Loading is the largest USPS approved mailbox that Salsbury Industries carries. Check it out here.

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If your business has USPS STD-4C horizontal mailboxes, one parcel locker is required for every five customer compartments. A parcel locker is a lockable unit where mail carriers can leave larger items that won’t fit in a standard mailbox.

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Yes, the USPS delivers to more than 150 million residential and business addresses daily.

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USPS STD-4C horizontal mailboxes are required for new construction and major renovations, while you can only use 4B horizontal and 4B vertical mailboxes for direct one-to-one replacements. If you don’t have to make any changes to the rough opening where the existing wall-mounted mailboxes are currently installed, 4B horizontal or 4B vertical mailboxes can be used (though you should always check with your local Post Office to be sure). Otherwise, 4C horizontal mailboxes must be used. Click here to view information in selecting the right mailbox for your application.

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A private mailbox is a mailbox that is delivered to by a non-USPS employee. Private mailboxes are commonly used in military bases, colleges, commercial buildings, private postal centers, government agencies, and several other applications.

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Centralized mail delivery is a mail delivery system in which mail for military personnel is delivered to one central location.

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Salsbury Industries carries a complete line of quality mailboxes for government and military facilities. Most items are in stock so you can get them right away to complete your project. Check them out here.

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Salsbury Industries carries a wide variety of government and military mailboxes for residences. A cluster box unit (CBU) is a popular option for an outdoor mailbox and 4C mailboxes are known for their security and professional appearance in indoor applications. If you check out our products, you are sure to find the perfect mailbox to suit your specific needs.

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An example of a community mailbox is a cluster box unit (CBU), which is a freestanding, pedestal-mounted mailbox that consists of multiple mailboxes and parcel compartments that can be locked individually.

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The mail carrier has a master key to an Arrow Lock that allows them to access all compartments at once. After delivering the mail, the mail carrier will lock the CBU up and each tenant will retrieve their mail from their particular box with a key.

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It depends on who installed the unit. Some units are bought and installed privately, while others are put there by the USPS. To find out whether your community mailbox is USPS-owned, you can contact your local post office.

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According to USPS regulations, the property owners, builders, or developers are responsible for cluster mailboxes. The USPS’s Postal Operations Manual states, “Purchase, installation, and maintenance of mail receptacles are the responsibility of the customer.”

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Salsbury CBU’s are constructed of heavy-duty aluminum and stainless steel hardware that will keep your mail and packages safe and secure. The door to each mail compartment comes with a heavy-duty cam lock and includes three keys. There is also an anti-fish plate on the rear of the mail slot to prevent any tampering with outgoing mail. CBU’s include parcel lockers that will keep your packages safe from theft.

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You may be able to move your community mailbox, but it must be in a location that is readily accessible by the mail carrier. Contact your local post office to check for any necessary approvals and/or regulations that might apply to your specific community mailbox location.

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A PO box is a lockable storage unit located at the post office while a private mailbox has a street address and a private individual (non-USPS employee) delivers the mail.

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A private mailbox is a mailbox that is delivered to by a non-USPS employee. Private mailboxes are commonly used in universities, colleges, commercial buildings, private postal centers, military bases, government agencies, and several other applications.

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Salsbury Industries carries a wide variety of private commercial mailboxes that would work as mailroom mailboxes. Check them out here.

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Some Salsbury private mailboxes can use combination locks. If they are available/compatible, you will see them in the “Related Items” section of each mailbox’s product page.

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Cell phone lockers are lockable units that keep electronics and other small valuable items safe and secure when not in use. They help to cut down on distraction in schools, offices, warehouses, retail locations, manufacturing facilities, and other locations where people store their belongings.

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It depends on where you plan to use them. Recessed mounted refers to units that fit into a rough opening and are secured with mounting hardware through the back or side panels and are ideal for classrooms and yoga and dance studios. Surface mounted refers to units that mount directly to a surface and are ideal for middle school and high school classrooms. Both products work well in health clubs, gyms, and government buildings.

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Combination locks tend to be the more popular option since these do not depend on keys to be given back for them to be reused. The combo locks can be reset for later use.

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You would need to have a new key issued or have the lock replaced.

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Salsbury cell phone lockers are made entirely of aluminum.

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Salsbury Industries carries a complete line of cell phone lockers for safe and secure storage of cell phones, tablets, keys, wallets, and other small valuables. Most items are in stock so you can get them right away to complete your project. Check them out here.

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