The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-01-291-0691, 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14 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-291-0691 |
| Item Name | Screw,cap,hexagon Head |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Head Height | 0.226 INCHES MINIMUM AND 0.243 INCHES MAXIMUM IN |
| Fastener Length | 5.400 INCHES MINIMUM AND 5.560 INCHES MAXIMUM IN |
| Thread Length | 5.275 INCHES MINIMUM AND 5.560 INCHES MAXIMUM IN |
| Material Document and Classification | SAE J429 GR 5 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Features Provided | FINISHED HEAD |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.551 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN |
| Nondefinitive Spec/std Data | 1 TYPE AND 5 GRADE |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 16 |
| 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 |
|---|---|
| MIL-S-1222 | 5/9 Secondary reference U.S. Government activity |
| M1222RN6C288GFNN | 2/2 Government specification standardization U.S. Government activity |
| MIL-DTL-1222 | 4/1 Identification reference U.S. Government activity |
| 0.375-16UNC-2AX5.500L | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-291-0691 is a Screw,cap,hexagon Head, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-01-291-0691: Head Height: 0.226 INCHES MINIMUM AND 0.243 INCHES MAXIMUM IN; Fastener Length: 5.400 INCHES MINIMUM AND 5.560 INCHES MAXIMUM IN; Thread Length: 5.275 INCHES MINIMUM AND 5.560 INCHES MAXIMUM IN; Material Document and Classification: SAE J429 GR 5 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 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.