The Screw,machine, cataloged under National Stock Number 5305-01-309-4381, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 19 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-309-4381 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Head Height | 0.094 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN |
| Bearing Surface of Head Surface Finish | 32.0 MICROINCHES |
| Screw Surface Treatment | OXIDE |
| Fastener Length | 0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN |
| Screw Material Document and Classification | AMS 6322 ASSN STD SINGLE MATERIAL RESPONSE |
| Thread Length | 0.224 INCHES MINIMUM AND 0.264 INCHES MAXIMUM IN |
| Hardness Rating | 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM |
| Shank Surface Finish | 32.0 MICROINCHES |
| Nominal Thread Diameter | 0.138 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Thread Surface Finish | 32.0 MICROINCHES |
| Width Between Flats | 0.243 INCHES MINIMUM AND 0.251 INCHES MAXIMUM IN |
| Screw Material | STEEL COMP 8740 |
| Color | BLACK |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 40 |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Screw Surface Treatment Document and Classification | AMS 2495 ASSN STD SINGLE TREATMENT RESPONSE |
| 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 |
|---|---|
| MS9281-03 | 2/2 Government specification standardization U.S. Government activity |
NSN 5305-01-309-4381 is a Screw,machine, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-01-309-4381: Head Height: 0.094 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN; Bearing Surface of Head Surface Finish: 32.0 MICROINCHES; Screw Surface Treatment: OXIDE; Fastener Length: 0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN. 19 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.