The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-00-021-4239, 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18 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-021-4239 |
| Item Name | Screw,cap,hexagon Head |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Head Height | 0.375 INCHES MINIMUM AND 0.390 INCHES MAXIMUM IN |
| Fastener Length | 1.969 INCHES MINIMUM AND 2.031 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,TY 1 CL 2 FED SPEC 1ST TREATMENT RESPONSE OR QQ-Z-325,TY 1 CL2 FED SPEC 2ND TREATMENT RESPONSE OVERALL |
| Thread Length | 1.500 INCHES MINIMUM AND 1.688 INCHES MAXIMUM IN |
| Hardness Rating | 302.0 BRINELL STANDARD MINIMUM AND 351.0 BRINELL STANDARD MAXIMUM OVERALL |
| Nominal Thread Diameter | 0.625 INCHES IN |
| Features Provided | UNFINISHED HEAD |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.861 INCHES MINIMUM AND 0.875 INCHES MAXIMUM IN |
| Locking Feature | DISTORTIONS BEARING SURFACE OF HEAD |
| Surface Treatment | CADMIUM OR ZINC OVERALL |
| Minimum Tensile Strength | 150000 POUNDS PER SQUARE INCH LBS |
| Minimum Yield Strength | 130000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 18 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNF |
| 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 |
|---|---|
| 5306000214239 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
| MS35764-505 | 2/2 Government specification standardization U.S. Government activity |
| 214239 | 5/1 Secondary reference Army Weapons Command Attn Amswe-Ree-S |
| 214239 | 5/1 Secondary reference General Motors Corp |
NSN 5305-00-021-4239 is a Screw,cap,hexagon Head, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-00-021-4239: Head Height: 0.375 INCHES MINIMUM AND 0.390 INCHES MAXIMUM IN; Fastener Length: 1.969 INCHES MINIMUM AND 2.031 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416,TY 1 CL 2 FED SPEC 1ST TREATMENT RESPONSE OR QQ-Z-325,TY 1 CL2 FED SPEC 2ND TREATMENT RESPONSE OVERALL; Thread Length: 1.500 INCHES MINIMUM AND 1.688 INCHES MAXIMUM 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.