The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-656-8627, 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18 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-656-8627 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Width Across Flats | 0.078 INCHES NOMINAL IN |
| Head Height | 0.097 INCHES NOMINAL IN |
| Fastener Length | 0.528 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | ASTM B633, TYPE II, CLASS FE/ZN 5 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.528 INCHES NOMINAL IN |
| Material Document and Classification | FF-S-86 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.1380 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 80205-NAS-24667 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Surface Treatment | ZINC OVERALL |
| Internal Drive Style | HEXAGON |
| Countersink Angle | 80.0 RADIANS MINIMUM AND 84.0 RADIANS MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.263 INCHES MINIMUM AND 0.307 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 |
|---|---|
| MS24667-10Z | 5/9 Secondary reference U.S. Government activity |
| MS24667-10Z | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-656-8627 is a Screw,cap,socket Head, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-01-656-8627: Width Across Flats: 0.078 INCHES NOMINAL IN; Head Height: 0.097 INCHES NOMINAL IN; Fastener Length: 0.528 INCHES NOMINAL IN; Surface Treatment Document and Classification: ASTM B633, TYPE II, CLASS FE/ZN 5 ASSN STD SINGLE TREATMENT RESPONSE OVERALL. 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.