The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-01-204-9057, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 16 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-204-9057 |
| Item Name | Screw,cap,hexagon Head |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Head Height | 0.226 INCHES MINIMUM AND 0.243 INCHES MAXIMUM IN |
| Fastener Length | 1.625 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | QQ-S-365 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 1.000 INCHES NOMINAL IN |
| Criticality Code Justification | ZZZY |
| Material Document and Classification | QQ-C-591 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.551 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN |
| Surface Treatment | SILVER OVERALL |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 16 |
| Material | COPPER ALLOY 651 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Reference Number Differentiating Characteristics | MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | C |
| Reference | Meaning |
|---|---|
| 926B834H01 | 3/9 Design control — primary reference Cbs Broadcasting Inc. Dba Cbs Div Bechtel Plant Machinery Inc. - Pittsburgh |
NSN 5305-01-204-9057 is a Screw,cap,hexagon Head, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-01-204-9057: Head Height: 0.226 INCHES MINIMUM AND 0.243 INCHES MAXIMUM IN; Fastener Length: 1.625 INCHES NOMINAL IN; Surface Treatment Document and Classification: QQ-S-365 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 1.000 INCHES NOMINAL IN. 16 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.