The Screw,tapping, cataloged under National Stock Number 5305-01-593-1985, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 6 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5305-01-593-1985 |
| Item Name | Screw,tapping |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Fastener Length | 0.344 INCHES MINIMUM AND 0.406 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,T2, C3 FED SPEC ALL TREATMENT RESPONSES OVERALL |
| Head Style | FLAT COUNTERSUNK UNDERCUT |
| Surface Treatment | CADMIUM OVERALL |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Material | STEEL OVERALL |
| 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 |
|---|---|
| BACS12HJ06K6 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-593-1985 is a Screw,tapping, classified under FSC 5305, Screws. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5305-01-669-4416. Verify interchangeability with system specifications before substitution.
Key specifications for 5305-01-593-1985: Fastener Length: 0.344 INCHES MINIMUM AND 0.406 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416,T2, C3 FED SPEC ALL TREATMENT RESPONSES OVERALL; Head Style: FLAT COUNTERSUNK UNDERCUT; Surface Treatment: CADMIUM OVERALL. 6 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.