The Setscrew, cataloged under National Stock Number 5305-00-281-3120, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 15 specifications, cited from the U.S. Government catalog. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 5305-00-281-3120 |
| Item Name | Setscrew |
| FSC / FSG | 5305 / 53 — Screws |
| Status | CANCELLED |
| Width Across Flats | 0.093 INCHES NOMINAL IN |
| Fastener Length | 0.187 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.187 INCHES MINIMUM IN |
| Hardness Rating | 25.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | HEADLESS (SETSCREW) |
| Thread Direction | RIGHT-HAND |
| Point Style | CUP |
| Surface Treatment | PASSIVATE OVERALL |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNF |
| Acquisition Status | CANCELLED |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 43S90990-925 | 5/9 Secondary reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| FF-S-200 | E/8 Replaced / superseded reference U.S. Government activity |
| 5305002813120 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
| MS51031-46 | 5/9 Secondary reference U.S. Government activity |
| 12Z1077PC17 | 5/9 Secondary reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| NAS1081C3D3 | E/8 Replaced / superseded reference U.S. Government activity |
| MS51023-48 | 2/2 Government specification standardization U.S. Government activity |
| 24809-16701 | 5/9 Secondary reference U.S. Government activity |
| 200064-2 | 5/9 Secondary reference Richards Imagery Interpretation Systems, L.l.c. |
NSN 5305-00-281-3120 is a Setscrew, classified under FSC 5305, Screws. Status: cancelled.
2 possible matches (shared part number, not a government interchangeability claim): 5305-00-724-5876, 2540-01-556-3201. Verify interchangeability with system specifications before substitution.
Key specifications for 5305-00-281-3120: Width Across Flats: 0.093 INCHES NOMINAL IN; Fastener Length: 0.187 INCHES NOMINAL IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.187 INCHES MINIMUM IN. 15 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 5305-00-281-3120 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.
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.