The Screw,shoulder, cataloged under National Stock Number 5305-00-679-4637, 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15 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5305-00-679-4637 |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Head Height | 0.250 INCHES NOMINAL IN |
| Fastener Length | 1.875 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | QQ-P-416,TYPE I,CLASS 1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.500 INCHES NOMINAL IN |
| Material Document and Classification | ASTM A108 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.438 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | CADMIUM OVERALL |
| Internal Drive Style | SLOT |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP 1213 OVERALL |
| Thread Series Designator | UNF |
| Head Diameter | 0.875 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 |
| Reference | Meaning |
|---|---|
| 56A23042 | 5/9 Secondary reference U.S. Government activity |
| 56A23042 | 5/9 Secondary reference Gse Production and Support Llc Dba Gse Spares |
| 56B23042-7 | 3/9 Design control — primary reference U.S. Government activity |
| 56A23042 | 5/9 Secondary reference U.S. Government activity |
| 56B23042 | D/9 Drawing number reference only U.S. Government activity |
NSN 5305-00-679-4637 is a Screw,shoulder, classified under FSC 5305, Screws. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 1450-00-955-9345, 5305-01-012-8376. Verify interchangeability with system specifications before substitution.
Key specifications for 5305-00-679-4637: Head Height: 0.250 INCHES NOMINAL IN; Fastener Length: 1.875 INCHES NOMINAL IN; Surface Treatment Document and Classification: QQ-P-416,TYPE I,CLASS 1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.500 INCHES NOMINAL 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.
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.