The Thumbscrew, cataloged under National Stock Number 5305-00-790-9673, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 20 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-790-9673 |
| Item Name | Thumbscrew |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Head Height | 0.625 INCHES NOMINAL IN |
| Point Length | 0.125 INCHES NOMINAL IN |
| Fastener Length | 1.656 INCHES NOMINAL IN |
| Thread Length | 0.906 INCHES MINIMUM IN |
| Material Document and Classification | QQ-S-764 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Point Chamfer Angle | 120.0 DEGREES NOMINAL |
| First Diameter From Head | 0.250 INCHES NOMINAL IN |
| Distance From Largest Bearing Surface of Head to End of Second Diameter | 0.531 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | KNURLED NO. 4 |
| Thread Direction | RIGHT-HAND |
| Second Diameter From Head | 0.185 INCHES MINIMUM AND 0.187 INCHES MAXIMUM IN |
| Point Style | CONE |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.469 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP 303 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.688 INCHES NOMINAL IN |
| 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 |
|---|---|
| 129556 | 3/9 Design control — primary reference Edo |
NSN 5305-00-790-9673 is a Thumbscrew, classified under FSC 5305, Screws. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 5310-01-186-5162, 5985-01-281-0188. Verify interchangeability with system specifications before substitution.
Key specifications for 5305-00-790-9673: Head Height: 0.625 INCHES NOMINAL IN; Point Length: 0.125 INCHES NOMINAL IN; Fastener Length: 1.656 INCHES NOMINAL IN; Thread Length: 0.906 INCHES MINIMUM IN. 20 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.