Product Specification Sheet APS031

Rev. 06/2017

5620 - 5621 Series Aluminum Flush Mount Key Keepers

5621 Model (shown with retractable reel)
Architects' And Engineers' Specifications
The key keeper(s) shall be Bommer 5620 (or 5621 or 5622) series, or approved equal, as supplied by Alpha Communications®. Key Keeper(s) shall be constructed of extruded aluminum. The key keeper(s) shall be ('loose key',' retractor reel' or 'push-button' type). The key keeper(s) shall be flush mounted into the finished wall surface (or surface mounted using the optional #5641 surface frame assembly). The finish of the key keeper shall match the finish of the mailboxes, or lobby panel/directories (or as specified by the architect). The key keeper door hinge shall be fully concealed to minimize vandalism and unauthorized opening.

Contractor shall install the key keeper as per all U.S. Postal Service regulations. Key keeper(s) shall include postal lock mounting bracket and screws required. Key keeper(s) shall be mounted (horizontally or vertically).
5620, 5621, 5622 Series Aluminum Flush Mount Key Keepers
The Bommer® 5620 and 5621 series flush mount key keepers are designed specifically to mount in conjunction with aluminum lobby panels, directories, and mail boxes.

The 5620 and 5621 series key keepers are U.S. Postal Approved, and are required when mailboxes are installed behind a locked entry door. This allows the Postman access to the mail boxes, without having to bother (or wait for) any of the building's tenants. These key keepers can be mounted vertically or horizontally and include the mounting bracket and screws for the installation of the postal lock (supplied by the local post office).

The 5620 and 5621 series key keepers are designed to be flush mounted. If surface mounting is required, you can easily add the optional 5641 series surface collar. The 5620 series key keepers are either 'loose key' type or can be made with a built-in momentary push-button (suffix 'PB'). The 5621 series key keepers feature a key retractor (reel) with 24" chain.

Note: An optional model 5622 is also available, which is the same as the 5620 series, except it has a 5-pin cam lock (and 2 keys) instead of the opening for the US Postal Service lock, for private use.

  • Made of Rugged Extruded Aluminum
  • Tamper and Vandal-Resistant (no visible screws)
  • Easy Installation
  • Available in a Number of Colors and Finishes
  • Mounts flush into the Finished Wall (or surface mounts using optional 5641 surface frame assembly)
  • Available in 'Loose-Key', 'Retractor Reel', or 'Push-button' styles (or optional 'Private Lock' style - 5622 series)
  • Hinges open on Fully Concealed Hinge Assembly
  • Can be mounted vertically or horizontally
  • U.S. Postal Service Approved

Wall Opening: 4.75"W (121mm) x 3.00"H (76mm) x 1.75"D (45mm) installed horizontally.

Outside Dimensions: 6.38"W (162mm) x 4.75"H (121mm) installed horizontally.


Heavy Duty Extruded Aluminum.


Natural Anodized Aluminum (628 finish), Gold Powder Coat (988 finish). Other finishes available on special-order. Contact us for more details.

Hinge Type:

Fully concealed hinge assembly


Flush. Predrilled mounting holes. For surface mounting use with optional 5641 surface frame assembly.

Alpha Communications
42 Central Drive • Farmingdale • NY • 11735-1202 • Phone: (631) 777-5500 • Fax: (631) 777-5599
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Due to continuous product improvement, all colors, sizes, materials, finishes and specifications are subject to change without notice.