The Thumbscrew, cataloged under National Stock Number 5305-01-055-2831, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is De-Cha Inc. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-055-2831 |
| Primary Part Number | 484875-1 |
| Item Name | Thumbscrew |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | De-Cha Inc |
| Status | ACTIVE |
| Head Height | 0.500 INCHES NOMINAL IN |
| Fastener Length | 0.880 INCHES NOMINAL IN |
| Thread Length | 0.880 INCHES NOMINAL IN |
| Material Document and Classification | QQ-A-250/11 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | KNURLED NO. 2 |
| Thread Direction | RIGHT-HAND |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | ALUMINUM ALLOY 6061 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 |
| Part Number | Manufacturer |
|---|---|
| 484875-1 PRIMARY | De-Cha Inc (USA) |
| Reference | Meaning |
|---|---|
| 484875-1 | 5/9 Secondary reference Raytheon Company Div Corp |
NSN 5305-01-055-2831 is a Thumbscrew, manufactured by De-Cha Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-055-2831 has 1 manufacturer part number on file: 484875-1 (De-Cha Inc).
Key specifications for 484875-1: Head Height: 0.500 INCHES NOMINAL IN; Fastener Length: 0.880 INCHES NOMINAL IN; Thread Length: 0.880 INCHES NOMINAL IN; Material Document and Classification: QQ-A-250/11 FED SPEC SINGLE MATERIAL RESPONSE OVERALL. 12 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.