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Sargent 464 Double Cylinder Deadlock — LA Keyway
The Sargent 464 Double Cylinder Deadlock delivers key-operated deadbolt control from both sides of the door — no thumbturn. Specified in the LA keyway, this auxiliary deadlock is engineered for commercial openings where positive, two-sided key access is required and interior free-egress is not permitted: store fronts, utility rooms, secondary exit corridors, and any opening where a thumbturn presents a security risk or code concern.
The double-cylinder configuration means that projecting or retracting the deadbolt always requires a key — inside and outside alike. This makes the 464 the correct choice when facility managers or specifiers need to prevent unauthorized exit as well as entry, or when integrating into a master key system that must maintain control at every cylinder position on the opening.
What 'Double Cylinder Deadlock' Means for Your Application
A double cylinder deadlock (sometimes referenced as ANSI/BHMA function type) uses an independent keyed cylinder on each face of the door. There is no thumb turn on the interior side. Both sides require a valid key to retract or project the bolt. This function is appropriate for applications such as:
- Store doors and vestibule entries requiring after-hours key control from both sides
- Secondary egress doors on commercial buildings where code and building management permit restricted interior egress
- Utility and mechanical rooms where interior access must also be controlled
- Doors integrated into a facility-wide master key or grand master key system
Note: Always verify applicable life safety and fire codes before specifying a double cylinder deadlock on any required egress path. Local authority having jurisdiction (AHJ) approval may be required.
LA Keyway
The LA keyway is a Sargent proprietary keyway profile in the open conventional tier — widely used and field-serviceable. Cylinders keyed to the LA keyway integrate cleanly into existing Sargent-keyway master key systems. If a higher-security or restricted keyway is needed, Sargent offers the 464 in additional keyway options; contact DoorwaysPlus for a quote on alternative keyway specifications or preferred-brand comparable alternatives.
Key Benefits
- Two-sided key control — deadbolt operated by key from interior and exterior; no thumbturn bypass
- Sargent 40 Series mortise cylinder — solid brass body, available in 6-pin standard configuration
- LA keyway — compatible with Sargent open-conventional key systems; readily masterkeyed
- Auxiliary deadlock — designed as a stand-alone auxiliary bolt lock, not a primary latchset replacement
- Commercial-grade construction — appropriate for light commercial and institutional auxiliary locking applications
Technical Details
| Feature | Details |
|---|---|
| Manufacturer | Sargent (ASSA ABLOY) |
| Model / Series | 464 |
| Lock Type | Double Cylinder Deadlock (auxiliary deadbolt) |
| Cylinder Configuration | Double cylinder — keyed both sides, no thumbturn |
| Keyway | LA (Sargent open conventional keyway) |
| Cylinder Type | Sargent 40 Series mortise cylinder, solid brass |
| Standard Pin Count | 6-pin standard |
| Keys Supplied | Supplied 1-bitted with 2 nickel silver keys per cylinder (standard) |
| Category | Dead Bolts / Auxiliary Locks |
| Typical Applications | Store doors, utility/mechanical rooms, secondary commercial openings |
For applications requiring a restricted keyway, higher-security cylinder (DG2, DG3/UL437), interchangeable core, or a comparable double-cylinder deadlock from a preferred line such as Corbin Russwin or PDQ, contact DoorwaysPlus for a specification review and competitive quote.
| Finish with BHMA code | 626 - US26D Satin Chrome or 613E - US10BE Oil Rubbed Bronze Equal or 605 - US3 Polish Brass or 606 - US4 Satin Brass or 612 - US10 Satin Bronze |
| Brand | Sargent |
| Deadlock Grade | Grade 2 - Std Dty |
| Deadbolt Function | Double Cylinder |
| Cylinder Options | LA Keyway |
| Backset | 2-3/4" Backset |
| Series | Sargent - 460 Series |
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