The Thumbscrew, cataloged under National Stock Number 5305-01-321-8044, 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18 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-321-8044 |
| Item Name | Thumbscrew |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Head Height | 0.430 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN |
| Point Length | 0.030 INCHES NOMINAL IN |
| Fastener Length | 0.760 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | QQ-P-416,TYPE 2,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.760 INCHES NOMINAL IN |
| Point Chamfer Angle | 45.0 DEGREES NOMINAL |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | THUMB NO. 3 |
| Thread Direction | RIGHT-HAND |
| Point Style | FLAT |
| Specification/standard Data | 96906-MS21316-26 GOVERNMENT STANDARD |
| Departure From Cited Document | AS MODIFIED BY THREAD AND FASTENER LG AND POINT STYLE AND 1 0.062 IN DIA HOLE 0.093 IN FROM BOTTOM OF POINT PARALLEL TO FLAT PORTION OF HEAD IN |
| Width Between Flats | 0.390 INCHES MINIMUM AND 0.470 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| 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 |
|---|---|
| 5029392 | 3/9 Design control — primary reference Us Army Combat Surveillance and Target Acquisition Laboratory |
NSN 5305-01-321-8044 is a Thumbscrew, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-01-321-8044: Head Height: 0.430 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN; Point Length: 0.030 INCHES NOMINAL IN; Fastener Length: 0.760 INCHES NOMINAL IN; Surface Treatment Document and Classification: QQ-P-416,TYPE 2,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 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.