The Thumbscrew, cataloged under National Stock Number 5305-00-276-3271, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 13 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-00-276-3271 |
| Item Name | Thumbscrew |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Head Height | 0.305 INCHES NOMINAL IN |
| Fastener Length | 1.810 INCHES MINIMUM AND 1.830 INCHES MAXIMUM IN |
| Thread Length | 1.745 INCHES MINIMUM IN |
| Material Document and Classification | QQ-B-637 FED SPEC 1ST MATERIAL RESPONSE OR QQ-B-639 FED SPEC 2ND MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | KNURLED NO. 1 |
| Thread Direction | RIGHT-HAND |
| Point Style | OVAL |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 20 |
| Material | COPPER ALLOY 462 OR COPPER ALLOY 464 OR COPPER ALLOY 482 OR COPPER ALLOY 485 OVERALL |
| Thread Series Designator | UNS |
| Head Diameter | 1.240 INCHES MINIMUM AND 1.260 INCHES MAXIMUM 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 |
|---|---|
| SP9147 | 3/9 Design control — primary reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
NSN 5305-00-276-3271 is a Thumbscrew, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-00-276-3271: Head Height: 0.305 INCHES NOMINAL IN; Fastener Length: 1.810 INCHES MINIMUM AND 1.830 INCHES MAXIMUM IN; Thread Length: 1.745 INCHES MINIMUM IN; Material Document and Classification: QQ-B-637 FED SPEC 1ST MATERIAL RESPONSE OR QQ-B-639 FED SPEC 2ND MATERIAL RESPONSE OVERALL. 13 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.