The Screw,machine, cataloged under National Stock Number 5305-01-481-5986, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 16 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-481-5986 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Head Height | 0.087 INCHES MINIMUM AND 0.096 INCHES MAXIMUM IN |
| Screw Surface Treatment | PASSIVATE |
| Fastener Length | 0.250 INCHES NOMINAL IN |
| Screw Material Document and Classification | ASTM A493 ASSN STD SINGLE MATERIAL RESPONSE |
| Thread Length | 0.250 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.164 INCHES IN |
| Features Provided | SEALING RING |
| Head Style | PAN NO. 2 |
| Thread Direction | RIGHT-HAND |
| Screw Material | STEEL CORROSION RESISTING |
| Internal Drive Style | SLOT |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 32 |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.306 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN |
| Screw Surface Treatment Document and Classification | MIL STD-171, FINISH 5.4.2 MIL SPEC 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 | X |
| Reference | Meaning |
|---|---|
| S8-32X1/4 | 5/1 Secondary reference U.S. Government activity |
| 401-4695027 | 5/2 Secondary reference U.S. Government activity |
| SS-0832-AA-04 | 3/2 Design control — primary reference U.S. Government activity |
| 401-4695027-15 | 5/9 Secondary reference U.S. Government activity |
| S8-32X1/4 2701 | 3/9 Design control — primary reference U.S. Government activity |
NSN 5305-01-481-5986 is a Screw,machine, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-01-481-5986: Head Height: 0.087 INCHES MINIMUM AND 0.096 INCHES MAXIMUM IN; Screw Surface Treatment: PASSIVATE; Fastener Length: 0.250 INCHES NOMINAL IN; Screw Material Document and Classification: ASTM A493 ASSN STD SINGLE MATERIAL RESPONSE. 16 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.