The Screw,machine, cataloged under National Stock Number 5305-00-237-9579, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 17 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-00-237-9579 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Head Height | 0.180 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN |
| Screw Surface Treatment | CADMIUM |
| Fastener Length | 0.310 INCHES MINIMUM AND 0.320 INCHES MAXIMUM IN |
| Screw Material Document and Classification | MIL-S-6058 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-6050 MIL SPEC 2ND MATERIAL RESPONSE |
| Thread Length | 0.280 INCHES MINIMUM IN |
| Criticality Code Justification | FEAT |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Screw Material | STEEL COMP 4130 OR STEEL COMP 8630 |
| Minimum Tensile Strength | 150000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | SLOT |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 28 |
| Thread Series Designator | UNF |
| Head Diameter | 0.423 INCHES MINIMUM AND 0.425 INCHES MAXIMUM IN |
| Screw Surface Treatment Document and Classification | F1.20 FSCM 81205 MFR REF SINGLE TREATMENT RESPONSE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Reference | Meaning |
|---|---|
| 60-6656 | 3/2 Design control — primary reference U.S. Government activity |
| 60-6656 | 5/9 Secondary reference Aviation Industries Inc |
NSN 5305-00-237-9579 is a Screw,machine, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-00-237-9579: Head Height: 0.180 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN; Screw Surface Treatment: CADMIUM; Fastener Length: 0.310 INCHES MINIMUM AND 0.320 INCHES MAXIMUM IN; Screw Material Document and Classification: MIL-S-6058 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-6050 MIL SPEC 2ND MATERIAL RESPONSE. 17 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.