The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-01-561-6481, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-561-6481 |
| Item Name | Screw,cap,hexagon Head |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Head Height | 0.348 INCHES MINIMUM AND 0.371 INCHES MAXIMUM IN |
| Fastener Length | 2.500 INCHES NOMINAL IN |
| Thread Length | 1.375 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.5625 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.798 INCHES MINIMUM AND 0.812 INCHES MAXIMUM IN |
| Surface Treatment | ZINC AND DICHROMATE ZINC OVERALL |
| Minimum Tensile Strength | 27300 POUNDS PER SQUARE INCH LBS |
| Thread Quantity Per Inch | 12 |
| Material | STEEL OVERALL |
| 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 |
|---|---|
| 12759-00726 | C/1 Advisory reference — outside the item-of-supply concept Fastenal Company Dba Fastenal Co |
| MS35303-142 | 2/2 Government specification standardization U.S. Government activity |
| 15263 | 5/1 Secondary reference Fastenal Company Dba Fastenal Co |
| 39135 | 5/1 Secondary reference Barnes Group Inc. Dba Barnes Distribution |
NSN 5305-01-561-6481 is a Screw,cap,hexagon Head, classified under FSC 5305, Screws. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 7530-01-608-8309. Verify interchangeability with system specifications before substitution.
Key specifications for 5305-01-561-6481: Head Height: 0.348 INCHES MINIMUM AND 0.371 INCHES MAXIMUM IN; Fastener Length: 2.500 INCHES NOMINAL IN; Thread Length: 1.375 INCHES NOMINAL IN; Nominal Thread Diameter: 0.5625 INCHES IN. 12 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.