The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-331-7197, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 14 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-331-7197 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Width Across Flats | 0.1094 INCHES MINIMUM AND 0.1111 INCHES MAXIMUM IN |
| Head Height | 0.134 INCHES MINIMUM AND 0.138 INCHES MAXIMUM IN |
| Fastener Length | 0.296 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN |
| Thread Length | 0.250 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.138 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | PASSIVATE OVERALL |
| Internal Drive Style | HEXAGON |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.218 INCHES MINIMUM AND 0.226 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 |
|---|---|
| N171P13005-1 | 3/2 Design control — primary reference U.S. Government activity |
| N171P13005 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-331-7197 is a Screw,cap,socket Head, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-01-331-7197: Width Across Flats: 0.1094 INCHES MINIMUM AND 0.1111 INCHES MAXIMUM IN; Head Height: 0.134 INCHES MINIMUM AND 0.138 INCHES MAXIMUM IN; Fastener Length: 0.296 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN; Thread Length: 0.250 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN. 14 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.