The Setscrew, cataloged under National Stock Number 5305-00-281-3293, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is General Motors Corp. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-281-3293 |
| Primary Part Number | 8603890 |
| Item Name | Setscrew |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | General Motors Corp |
| Status | ACTIVE |
| Head Height | 0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN |
| Fastener Length | 2.615 INCHES MINIMUM AND 2.635 INCHES MAXIMUM IN |
| Thread Length | 2.230 INCHES MINIMUM AND 2.270 INCHES MAXIMUM IN |
| Hardness Rating | 30.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Features Provided | CASEHARDENED |
| Head Style | SQUARE |
| Thread Direction | RIGHT-HAND |
| Point Style | FULL DOG |
| Width Between Flats | 0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM IN |
| Surface Treatment | ZINC OVERALL |
| Internal Drive Style | W/O INTERNAL DRIVE |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP 1141 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 |
| Part Number | Manufacturer |
|---|---|
| 8603890 PRIMARY | General Motors Corp (USA) |
| Reference | Meaning |
|---|---|
| 8603890 | 5/9 Secondary reference Hydramatic Div of General Motors Corp |
| 8603890 | 5/9 Secondary reference Military Vehicles Opn General Motors Truck and Bus Group Ms 2603-02 |
| 8603890 | C/1 Advisory reference — outside the item-of-supply concept General Motors Llc Dba General Motors Llc |
NSN 5305-00-281-3293 is a Setscrew, manufactured by General Motors Corp, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-281-3293 has 1 manufacturer part number on file: 8603890 (General Motors Corp).
Key specifications for 8603890: Head Height: 0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN; Fastener Length: 2.615 INCHES MINIMUM AND 2.635 INCHES MAXIMUM IN; Thread Length: 2.230 INCHES MINIMUM AND 2.270 INCHES MAXIMUM IN; Hardness Rating: 30.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM OVERALL. 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.