The Screw,shoulder, cataloged under National Stock Number 5305-01-671-6931, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Stanley Engineered Fastening Llc. Government technical data includes 13 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 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 | 5305-01-671-6931 |
| Primary Part Number | 73145 |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Stanley Engineered Fastening Llc |
| Status | ACTIVE |
| Width Across Flats | 0.0188 INCHES NOMINAL IN |
| Head Height | 0.250 INCHES NOMINAL IN |
| Fastener Length | 3.745 INCHES MINIMUM AND 3.755 INCHES MAXIMUM IN |
| Thread Length | 0.500 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | KNURLED NO. 1 |
| Thread Direction | RIGHT-HAND |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 18 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.563 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 5305-01-671-6931 is a Screw,shoulder, manufactured by Stanley Engineered Fastening Llc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-671-6931 has 2 manufacturer part numbers on file: 90298A637 (Mcmaster-Carr Supply Co), 73145 (Stanley Engineered Fastening Llc).
1 possible match (shared part number, not a government interchangeability claim): 6680-01-710-9696. Verify interchangeability with system specifications before substitution.
Key specifications for 73145: Width Across Flats: 0.0188 INCHES NOMINAL IN; Head Height: 0.250 INCHES NOMINAL IN; Fastener Length: 3.745 INCHES MINIMUM AND 3.755 INCHES MAXIMUM IN; Thread Length: 0.500 INCHES NOMINAL IN. 13 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.