The Lock,flush, cataloged under National Stock Number 5340-00-028-0188, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. Government technical data includes 6 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-00-028-0188 |
| Item Name | Lock,flush |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Status | ACTIVE |
| Design Type | DEAD BOLT |
| Features Provided | MASTER KEY PROVISIONS |
| Material | COPPER ALLOY CASE |
| Backset Depth | 0.875 INCHES NOMINAL IN |
| Operation Method | OUTSIDE KEY DEAD BOLT |
| Reference Number Differentiating Characteristics | FEAT |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Unit of Issue | EA |
| Reference | Meaning |
|---|---|
| E555021 | 5/1 Secondary reference Lockheed Martin Corporation Div Rotary and Mission Systems |
| M2-0056TYOE1 | 3/9 Design control — primary reference National Lock Co |
NSN 5340-00-028-0188 is a Lock,flush, classified under FSC 5340, Hardware, Commercial. Status: active.
Key specifications for 5340-00-028-0188: Design Type: DEAD BOLT; Features Provided: MASTER KEY PROVISIONS; Special Features: DRAWER TYPE,G;BRIGHT CHROMIUM FINISH;LOCKING MECHANISM TYPE:PIN TUMBLER;; Material: COPPER ALLOY CASE. 6 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.