The Setscrew, cataloged under National Stock Number 5305-00-331-9557, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 14 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-331-9557 |
| Item Name | Setscrew |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Head Height | 0.050 INCHES NOMINAL IN |
| Fastener Length | 0.406 INCHES NOMINAL IN |
| Thread Length | 0.366 INCHES MINIMUM IN |
| Nominal Thread Diameter | 0.086 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Point Style | FULL DOG |
| Width Between Flats | 0.090 INCHES MINIMUM AND 0.096 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Internal Drive Style | W/O INTERNAL DRIVE |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 64 |
| Material | STEEL COMP 302 OR STEEL COMP 303 OR STEEL COMP 304 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 |
|---|---|
| 1297B74B | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-00-331-9557 is a Setscrew, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-00-331-9557: Head Height: 0.050 INCHES NOMINAL IN; Fastener Length: 0.406 INCHES NOMINAL IN; Thread Length: 0.366 INCHES MINIMUM IN; Nominal Thread Diameter: 0.086 INCHES IN. 14 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.