The Thumbscrew, cataloged under National Stock Number 5305-00-255-5481, 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16 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-255-5481 |
| Item Name | Thumbscrew |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Point Swivel Included Angle | 40.0 DEGREES NOMINAL |
| Point Diameter | 0.375 INCHES NOMINAL IN |
| Head Height | 0.312 INCHES NOMINAL IN |
| Point Length | 0.359 INCHES NOMINAL IN |
| Fastener Length | 1.031 INCHES NOMINAL IN |
| Thread Length | 0.547 INCHES MINIMUM IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Features Provided | CASEHARDENED |
| Head Style | KNURLED NO. 1 |
| Point Style | UNIVERSAL |
| Surface Treatment | ZINC OVERALL |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 1.000 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 |
|---|---|
| C3910-17 | 7/2 Vendor item drawing reference U.S. Government activity |
| CL17SH | 5/9 Secondary reference U.S. Government activity |
| CL-17-SHS | 3/2 Design control — primary reference U.S. Government activity |
| C3910-17 | 5/9 Secondary reference Catty H D Corp |
NSN 5305-00-255-5481 is a Thumbscrew, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-00-255-5481: Point Swivel Included Angle: 40.0 DEGREES NOMINAL; Point Diameter: 0.375 INCHES NOMINAL IN; Head Height: 0.312 INCHES NOMINAL IN; Point Length: 0.359 INCHES NOMINAL IN. 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.