The Thumbscrew, cataloged under National Stock Number 5305-01-659-2123, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 22 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-659-2123 |
| Item Name | Thumbscrew |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Point Diameter | 0.198 INCHES NOMINAL IN |
| Head Height | 0.750 INCHES NOMINAL IN |
| Point Length | 0.28 INCHES NOMINAL IN |
| Fastener Length | 1.43 INCHES NOMINAL IN |
| Hole Thread Quantity Per Inch | 24 |
| Hole Configuration Style | ROUND PERPENDICULAR |
| Point Chamfer Angle | 45.0 DEGREES NOMINAL |
| First Diameter From Head | 0.250 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | KNURLED NO. 5 |
| Thread Direction | RIGHT-HAND |
| Point Style | CHAMFER DOG |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.160 INCHES NOMINAL IN |
| Externally Relieved Body Diameter Quantity | 1 |
| Thread Class | 2A A |
| Hole Nominal Thread Diameter | 0.190 INCHES IN |
| Thread Quantity Per Inch | 24 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Hole Quantity | 1 |
| Thread Series Designator | UNF |
| Hole Type | THREADED |
| Head Diameter | 1.250 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 |
|---|---|
| MA280006-21 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-659-2123 is a Thumbscrew, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-01-659-2123: Point Diameter: 0.198 INCHES NOMINAL IN; Head Height: 0.750 INCHES NOMINAL IN; Point Length: 0.28 INCHES NOMINAL IN; Fastener Length: 1.43 INCHES NOMINAL IN. 22 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.