The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-628-6355, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 14 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-628-6355 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Width Across Flats | 0.4375 INCHES NOMINAL IN |
| Head Height | 0.150 INCHES MINIMUM AND 0.163 INCHES MAXIMUM IN |
| Fastener Length | 0.375 INCHES NOMINAL IN |
| Thread Length | 0.375 INCHES NOMINAL IN |
| Material Document and Classification | FF-S-86 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL UNS K03104 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.428 INCHES MINIMUM AND 0.438 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 |
|---|---|
| 0.250-20UNC-3AX0.375 STL | 5/2 Secondary reference U.S. Government activity |
| 845-4558738 ITEM 71 | 3/2 Design control — primary reference U.S. Government activity |
| 60-16-9361 | 5/2 Secondary reference U.S. Government activity |
NSN 5305-01-628-6355 is a Screw,cap,socket Head, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-01-628-6355: Width Across Flats: 0.4375 INCHES NOMINAL IN; Head Height: 0.150 INCHES MINIMUM AND 0.163 INCHES MAXIMUM IN; Fastener Length: 0.375 INCHES NOMINAL IN; Thread Length: 0.375 INCHES NOMINAL IN. 14 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.