The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-01-283-3590, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 19 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-283-3590 |
| Item Name | Screw,cap,hexagon Head |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Head Height | 0.195 INCHES MINIMUM AND 0.235 INCHES MAXIMUM IN |
| Fastener Length | 2.940 INCHES MINIMUM AND 3.040 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | ASTM B633, TYPE II ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.875 INCHES MINIMUM IN |
| Hardness Rating | 23.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | MIL-DTL-1222, GRADE 5 MIL STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Features Provided | FINISHED HEAD |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.484 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN |
| Nondefinitive Spec/std Data | 1 TYPE |
| Surface Treatment | ZINC OVERALL |
| Minimum Tensile Strength | 120000 POUNDS PER SQUARE INCH LBS |
| Minimum Yield Strength | 92000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 18 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| 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 |
|---|---|
| MIL-DTL-1222 | 4/1 Identification reference U.S. Government activity |
| 5/16-18UNC-2A X 3 IN LG ZINC | 5/9 Secondary reference U.S. Government activity |
| M1222RN5C248GFNZE | 2/2 Government specification standardization U.S. Government activity |
| MIL-S-1222 | 5/9 Secondary reference U.S. Government activity |
| 5/16-18UNC-2A X 3 IN LG ZINC | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-283-3590 is a Screw,cap,hexagon Head, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-01-283-3590: Head Height: 0.195 INCHES MINIMUM AND 0.235 INCHES MAXIMUM IN; Fastener Length: 2.940 INCHES MINIMUM AND 3.040 INCHES MAXIMUM IN; Surface Treatment Document and Classification: ASTM B633, TYPE II ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.875 INCHES MINIMUM IN. 19 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.