Short answer: the Master Lock 1654 is designed for a compatible right-hinged horizontal-latch box locker, while the Master Lock 1690 is designed for a compatible right-hinged single-point rotating Wrap-Around-Latch™ locker. Both lock automatically and use institutional preset combinations, but their rear latch assemblies solve different mechanical applications.
Master Lock 1654 vs. 1690 Comparison
| Selection point | Master Lock 1654 | Master Lock 1690 |
|---|---|---|
| Locker application | Horizontal-latch box or multiple-tier locker | Single-point rotating Wrap-Around-Latch locker |
| Documented handing | Right-hinged | Right-hinged |
| Locking action | Automatic springbolt | Automatic deadbolt with wrap-around engagement |
| Combination system | Three-number operation; five preset combinations | Three-number operation; five preset combinations |
| Body width | 1-7/8 in (48 mm) | 1-7/8 in (48 mm) |
The Latch Behind the Door Decides
Do not select between these models from the front dial or body width. Open a representative locker and inspect how the door secures. A box locker uses a horizontal latch and springbolt relationship. The 1690 application uses a rotating latch that wraps around a stationary plate or post. Those parts move differently and require the matching rear assembly.
Use the replacement lock identification guide if the latch type is not yet known. Photos should show the door edge, rear lock case, latch, and frame contact point without revealing combinations or control-key information.
Choose the 1654 for a Right-Hinged Box Locker
The Master Lock 1654 is manufacturer-described for standard horizontal-latch box lockers with hinges on the right. Its springbolt action provides automatic locking when the compatible mechanism closes. It uses a secure three-number combination, five preset combinations, end-user registration, and control charts.
Box and multiple-tier locker banks can include different door handing. The standard 1654 is the right-hand model; the 1654 vs. 1655 guide covers the manufacturer’s right- and left-hand pair. Do not rotate a right-hand model to improvise a left-hand installation.
Choose the 1690 for the Documented Wrap-Around-Latch Application
The Master Lock 1690 is designed for compatible right-hinged single-point rotating-latch lockers. Its latch wraps around the strike, and Master Lock describes automatic slam-shut operation with automatic deadbolt locking. The manufacturer also says the design tolerates some locker misalignment, but that is not permission to ignore damaged, distorted, or incompatible doors.
The Master Lock 1690 guide explains the application in more detail. If the school wants a keyed user-access model for the same documented mechanism, the 1690-versus-1790 comparison addresses that separate choice.
Shared Features Do Not Make the Models Interchangeable
Both locks are indoor built-in combination models with automatic locking, a 1-7/8-inch body width, five preset combinations, registered-system records, and supervisory control-key functions. Both standard pages identify an extension kit for a defined thicker-door range. Those common attributes can simplify administration across a campus, but they do not determine physical fit.
A lock survey should therefore separate model-family questions from configuration questions. First identify the latch and hinge side. Then confirm door preparation, thickness, extensions, dial material, registered-system requirements, and quantity. Keep combination charts and key identifiers out of general project correspondence.
Frequently Asked Questions
What is the main difference between the Master Lock 1654 and 1690?
The 1654 is for a horizontal-latch box locker; the 1690 is for a rotating single-point Wrap-Around-Latch application.
Do both models lock automatically?
Yes. The 1654 uses springbolt action, while the 1690 uses automatic wrap-around deadbolt engagement.
Can a 1690 replace a 1654 because both are right-handed?
No. Handing is only one selection factor. The locker latch and door preparation must match the model’s documented application.
Does the 1690’s misalignment tolerance fix a damaged locker?
No. It is a design characteristic, not a repair method or compatibility guarantee. Inspect and correct damaged hardware before installation.
Are combination and control-key records the same for every order?
No. Registered-system information is installation-specific. Confirm the exact system through an authorized process rather than assuming an existing key or chart will match.
Request a Mechanism Review
Contact School Lock Supply with clear non-sensitive photos of the front and rear hardware, hinge side, door thickness, current model markings, and counts for each locker bank.
Master Lock references: 1654 specifications, 1690 specifications, institutional locker-lock catalog.
