The Screw,machine, cataloged under National Stock Number 5305-01-658-8342, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 21 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-658-8342 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Head Height | 0.0580 INCHES MINIMUM AND 0.0700 INCHES MAXIMUM IN |
| Locking Feature Material Document and Classification | NAS-51959 NATIONAL SPEC ALL MATERIAL RESPONSES |
| Screw Surface Treatment | OXIDE |
| Fastener Length | 2.2500 INCHES NOMINAL IN |
| Screw Material Document and Classification | NAS-51959 MIL SPEC ALL MATERIAL RESPONSES |
| Thread Length | 2.1500 INCHES NOMINAL IN |
| Nominal Thread Diameter | 2.1500 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Head Length | 0.1000 INCHES NOMINAL IN |
| Locking Feature | UNDERCUT |
| Screw Material | STEEL CORROSION RESISTING |
| Bottom Countersink Diameter | 0.0250 INCHES NOMINAL IN |
| Color | BLACK |
| Minimum Yield Strength | 30000 POUNDS PER SQUARE INCH LOCATION NOT OTHERWISE SPECIFIED LBS |
| Internal Drive Style | CRUCIFORM RIBBED |
| Countersink Angle | 0.0660 RADIANS NOMINAL |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 32 |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.3060 INCHES MINIMUM 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 |
|---|---|
| MS51959-54B | 2/2 Government specification standardization U.S. Government activity |
NSN 5305-01-658-8342 is a Screw,machine, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-01-658-8342: Head Height: 0.0580 INCHES MINIMUM AND 0.0700 INCHES MAXIMUM IN; Locking Feature Material Document and Classification: NAS-51959 NATIONAL SPEC ALL MATERIAL RESPONSES; Screw Surface Treatment: OXIDE; Fastener Length: 2.2500 INCHES NOMINAL IN. 21 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.