The Screw,machine, cataloged under National Stock Number 5305-00-421-9178, 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14 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-421-9178 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Head Height | 0.091 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN |
| Screw Surface Treatment | CADMIUM |
| Fastener Length | 0.307 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN |
| Thread Length | 0.307 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.164 INCHES IN |
| Features Provided | CASEHARDENED |
| Head Style | FILLISTER |
| Thread Direction | RIGHT-HAND |
| Screw Material | STEEL |
| Internal Drive Style | SLOT |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 32 |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.250 INCHES MINIMUM AND 0.270 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 |
|---|---|
| 1090799 | 3/9 Design control — primary reference H & E Venture, Llc |
NSN 5305-00-421-9178 is a Screw,machine, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-00-421-9178: Head Height: 0.091 INCHES MINIMUM AND 0.106 INCHES MAXIMUM IN; Screw Surface Treatment: CADMIUM; Fastener Length: 0.307 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN; Thread Length: 0.307 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.