The Thumbscrew, cataloged under National Stock Number 5305-01-203-5294, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 18 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-203-5294 |
| Item Name | Thumbscrew |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Head Height | 0.500 INCHES NOMINAL IN |
| Point Length | 0.156 INCHES NOMINAL IN |
| Fastener Length | 2.094 INCHES NOMINAL IN |
| Thread Length | 0.469 INCHES NOMINAL IN |
| Criticality Code Justification | ZZZY |
| Point Chamfer Angle | 60.0 DEGREES NOMINAL |
| First Diameter From Head | 0.218 INCHES MINIMUM AND 0.222 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | KNURLED NO. 1 |
| Thread Direction | RIGHT-HAND |
| Second Diameter From Head | 0.215 INCHES NOMINAL IN |
| Point Style | FLAT |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Reference Number Differentiating Characteristics | MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS |
| Head Diameter | 0.750 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 | C |
| Reference | Meaning |
|---|---|
| 117251-1 | 3/1 Design control — primary reference U.S. Government activity |
NSN 5305-01-203-5294 is a Thumbscrew, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-01-203-5294: Head Height: 0.500 INCHES NOMINAL IN; Point Length: 0.156 INCHES NOMINAL IN; Fastener Length: 2.094 INCHES NOMINAL IN; Thread Length: 0.469 INCHES NOMINAL IN. 18 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.