The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-331-7567, 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15 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-331-7567 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Width Across Flats | 1.250 INCHES NOMINAL IN |
| Head Height | 1.734 INCHES MINIMUM AND 1.750 INCHES MAXIMUM IN |
| Fastener Length | 7.000 INCHES NOMINAL IN |
| Thread Length | 4.375 INCHES MINIMUM IN |
| Material Document and Classification | QQ-N-286 FED SPEC ALL MATERIAL RESPONSES OVERALL |
| Nominal Thread Diameter | 1.750 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Locking Feature | PATCH OR PELLET OR STRIP THREADS |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 7 |
| Material | NICKEL ALLOY K-500 OR NICKEL ALLOY 502 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 2.597 INCHES MINIMUM AND 2.625 INCHES MAXIMUM 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 |
|---|---|
| 845-4687581 ITEM 27 | 3/2 Design control — primary reference U.S. Government activity |
| 60-15-1210 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-331-7567 is a Screw,cap,socket Head, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-01-331-7567: Width Across Flats: 1.250 INCHES NOMINAL IN; Head Height: 1.734 INCHES MINIMUM AND 1.750 INCHES MAXIMUM IN; Fastener Length: 7.000 INCHES NOMINAL IN; Thread Length: 4.375 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.
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.