The Screw,machine, cataloged under National Stock Number 5305-01-021-3438, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 18 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-021-3438 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Screw Surface Treatment | CADMIUM |
| Fastener Length | 0.469 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN |
| Screw Material Document and Classification | MIL-S-7839 MIL SPEC SINGLE MATERIAL RESPONSE |
| Thread Length | 0.438 INCHES NOMINAL IN |
| Hardness Rating | 27.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM |
| Nominal Thread Diameter | 0.164 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 80205-NAS514 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Screw Material | STEEL |
| Minimum Tensile Strength | 125000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | SLOT |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Thread Series Designator | UNJC |
| Head Diameter | 0.319 INCHES NOMINAL IN |
| Screw Surface Treatment Document and Classification | QQ-P-416,TY 1,CL 2 FED SPEC 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 |
|---|---|
| NAS514-832-8 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-021-3438 is a Screw,machine, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-01-021-3438: Screw Surface Treatment: CADMIUM; Fastener Length: 0.469 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN; Screw Material Document and Classification: MIL-S-7839 MIL SPEC SINGLE MATERIAL RESPONSE; Thread Length: 0.438 INCHES NOMINAL IN. 18 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.