The Snap Hook, cataloged under National Stock Number 5340-00-291-3551, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. Government technical data includes 11 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 5340-00-291-3551 |
| Item Name | Snap Hook |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Status | ACTIVE |
| Inside Width | 0.281 INCHES NOMINAL IN |
| Unattached Ring | NOT INCLUDED |
| Inside Length | 1.125 INCHES NOMINAL IN |
| Design Type | FIXED |
| End Connection Style | LOOP |
| End Position | CONNECTION END AT RIGHT ANGLE TO PLANE OF HOOK END |
| Hook Style Designator | SPRING BLADE |
| Material | COPPER ALLOY HOOK |
| Material | COPPER ALLOY CONNECTION END |
| Material | COPPER ALLOY 511 BLADE |
| Rubber Covered Feature | NOT INCLUDED |
| 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 |
|---|---|
| MS51828-3B | 5/9 Secondary reference U.S. Government activity |
| M43770/1-CWBC3 | 3/2 Design control — primary reference U.S. Government activity |
| NASM43770/1 | 3/1 Design control — primary reference U.S. Government activity |
NSN 5340-00-291-3551 is a Snap Hook, classified under FSC 5340, Hardware, Commercial. Status: active.
4 possible matches (shared part number, not a government interchangeability claim): 5340-01-022-8584, 5340-01-187-9402, 5340-01-400-0533. Verify interchangeability with system specifications before substitution.
Key specifications for 5340-00-291-3551: Inside Width: 0.281 INCHES NOMINAL IN; Unattached Ring: NOT INCLUDED; Inside Length: 1.125 INCHES NOMINAL IN; Design Type: FIXED. 11 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.