The Screw,machine, cataloged under National Stock Number 5305-01-321-5072, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 13 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-321-5072 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Head Height | 0.079 INCHES MINIMUM AND 0.089 INCHES MAXIMUM IN |
| Screw Surface Treatment | ZINC |
| Fastener Length | 0.620 INCHES NOMINAL IN |
| Thread Length | 0.570 INCHES MINIMUM IN |
| Nominal Thread Diameter | 0.125 INCHES IN |
| Head Style | PAN |
| Thread Direction | RIGHT-HAND |
| Screw Material | STEEL |
| Internal Drive Style | SLOT |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 40 |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.231 INCHES MINIMUM AND 0.245 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 |
|---|---|
| 068179 | 3/9 Design control — primary reference Big Joe Mfg Co |
NSN 5305-01-321-5072 is a Screw,machine, classified under FSC 5305, Screws. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5995-01-343-4799. Verify interchangeability with system specifications before substitution.
Key specifications for 5305-01-321-5072: Head Height: 0.079 INCHES MINIMUM AND 0.089 INCHES MAXIMUM IN; Screw Surface Treatment: ZINC; Fastener Length: 0.620 INCHES NOMINAL IN; Thread Length: 0.570 INCHES MINIMUM IN. 13 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.