The Setscrew, cataloged under National Stock Number 5305-00-281-3294, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 16 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-281-3294 |
| Item Name | Setscrew |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Point Diameter | 0.180 INCHES MINIMUM AND 0.183 INCHES MAXIMUM IN |
| Head Height | 0.172 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN |
| Point Length | 0.109 INCHES MINIMUM AND 0.141 INCHES MAXIMUM IN |
| Fastener Length | 0.734 INCHES MINIMUM AND 0.766 INCHES MAXIMUM IN |
| Thread Length | 0.516 INCHES MINIMUM AND 0.609 INCHES MAXIMUM IN |
| Material Document and Classification | QQ-S-630 FS1018 FED SPEC 1ST MATERIAL RESPONSE OR QQ-S-631 FED SPEC 2ND MATERIAL RESPONSE OR QQ-S-634 FED SPEC 3RD MATERIAL RESPONSE OR QQ-S-630 FED SPEC 4TH MATERIAL RESPONSE OR QQ-S-631 FED SPEC 5TH MATERIAL RESPONSE OR QQ-S-634 FED SPEC 6TH MATERIAL RESPONSE OR QQ-S-633 FED SPEC 7TH MATERIAL RESPONSE OR QQ-S-633 FED SPEC 8TH MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | SQUARE |
| Thread Direction | RIGHT-HAND |
| Point Style | DOG |
| Width Between Flats | 0.234 INCHES MINIMUM AND 0.266 INCHES MAXIMUM IN |
| Surface Treatment | ZINC OVERALL |
| Internal Drive Style | W/O INTERNAL DRIVE |
| Thread Class | 1A A |
| Thread Quantity Per Inch | 20 |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| A308411 | 5/9 Secondary reference CAGE 00000 |
| 156972 | 3/9 Design control — primary reference Sasco Inc Canadian Div |
NSN 5305-00-281-3294 is a Setscrew, classified under FSC 5305, Screws. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 3020-00-288-3226, 5995-00-677-8846. Verify interchangeability with system specifications before substitution.
Key specifications for 5305-00-281-3294: Point Diameter: 0.180 INCHES MINIMUM AND 0.183 INCHES MAXIMUM IN; Head Height: 0.172 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN; Point Length: 0.109 INCHES MINIMUM AND 0.141 INCHES MAXIMUM IN; Fastener Length: 0.734 INCHES MINIMUM AND 0.766 INCHES MAXIMUM IN. 16 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.
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.