The Lock,flush, cataloged under National Stock Number 5340-00-663-3438, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Lockheed Martin Corporation Div Rotary and Mission Systems. Government technical data includes 5 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-00-663-3438 |
| Primary Part Number | E555195 |
| Item Name | Lock,flush |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Lockheed Martin Corporation Div Rotary and Mission Systems |
| 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 |
| 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 |
| Part Number | Manufacturer |
|---|---|
| E555195 PRIMARY | Lockheed Martin Corporation Div Rotary and Mission Systems (USA) |
| Reference | Meaning |
|---|---|
| 04836 | 5/9 Secondary reference National Lock Co |
| MS-0056G | 5/9 Secondary reference National Lock Co |
| 68-056 | 5/9 Secondary reference National Lock Co |
| M20056 | 5/9 Secondary reference National Lock Co |
NSN 5340-00-663-3438 is a Lock,flush, manufactured by Lockheed Martin Corporation Div Rotary and Mission Systems, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-00-663-3438 has 1 manufacturer part number on file: E555195 (Lockheed Martin Corporation Div Rotary and Mission Systems).
4 possible matches (shared part number, not a government interchangeability claim): 4730-01-184-2181, 5895-01-399-0240, 7510-01-462-1386. Verify interchangeability with system specifications before substitution.
Key specifications for E555195: Design Type: DEAD BOLT; Features Provided: MASTER KEY PROVISIONS; Special Features: LOCKING MECHANISM TYPE:PIN TUMBLER;BOLT POSITION AT 90 DEG TO RIGHT OF KEY INSERT IN UNLOCKED POSITION;MASTER KEY PROVISION:INCLUDED;; End Item Identification: ENGINE,AIRCRAFT,TF34-GE-100 (A-10). 5 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.