The Thumbscrew, cataloged under National Stock Number 5305-01-088-7955, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. Government technical data includes 24 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-088-7955 |
| Primary Part Number | 810AS1275 |
| Item Name | Thumbscrew |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| Status | ACTIVE |
| Fourth Diameter From Head | 0.175 INCHES MINIMUM AND 0.185 INCHES MAXIMUM IN |
| Head Height | 0.250 INCHES NOMINAL IN |
| Fastener Length | 1.000 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | QQ-P-35 CL1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.630 INCHES NOMINAL IN |
| Material Document and Classification | ASTM A582 ASSN STD ALL MATERIAL RESPONSES OVERALL |
| First Diameter From Head | 0.380 INCHES NOMINAL IN |
| Distance From Largest Bearing Surface of Head to End of Second Diameter | 0.240 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Distance From Largest Bearing Surface of Head to End of Third Diameter | 0.303 INCHES NOMINAL IN |
| Head Style | KNURLED NO. 4 |
| Thread Direction | RIGHT-HAND |
| Second Diameter From Head | 0.280 INCHES NOMINAL IN |
| Point Style | FLAT |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.178 INCHES NOMINAL IN |
| Externally Relieved Body Diameter Quantity | 4 |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP 303 OR STEEL COMP 303SE OVERALL |
| Distance From Largest Bearing Surface of Head to End of Fourth Diameter | 0.373 INCHES NOMINAL IN |
| Third Diameter From Head | 0.380 INCHES NOMINAL IN |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.500 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 |
|---|---|
| 810AS1275 PRIMARY | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
NSN 5305-01-088-7955 is a Thumbscrew, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-088-7955 has 1 manufacturer part number on file: 810AS1275 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier).
Key specifications for 810AS1275: Fourth Diameter From Head: 0.175 INCHES MINIMUM AND 0.185 INCHES MAXIMUM IN; Head Height: 0.250 INCHES NOMINAL IN; Fastener Length: 1.000 INCHES NOMINAL IN; Surface Treatment Document and Classification: QQ-P-35 CL1 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 24 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.