The Thumbscrew, cataloged under National Stock Number 5305-00-401-5301, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Essex Electro Engineers Inc. Government technical data includes 14 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 | 5305-00-401-5301 |
| Primary Part Number | A265-1456 |
| Item Name | Thumbscrew |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Essex Electro Engineers Inc |
| Status | ACTIVE |
| Head Height | 0.500 INCHES NOMINAL IN |
| Fastener Length | 1.000 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | MIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE HEAD |
| Thread Length | 1.000 INCHES MINIMUM IN |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | KNURLED NO. 1 |
| Thread Direction | RIGHT-HAND |
| Point Style | FLAT |
| Surface Treatment | OXIDE FILM HEAD |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 24 |
| Material | ALUMINUM ALLOY 2024 OVERALL |
| Thread Series Designator | UNF |
| Head Diameter | 1.500 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 |
|---|---|
| A265-1456 PRIMARY | Essex Electro Engineers Inc (USA) |
NSN 5305-00-401-5301 is a Thumbscrew, manufactured by Essex Electro Engineers Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-401-5301 has 1 manufacturer part number on file: A265-1456 (Essex Electro Engineers Inc).
Key specifications for A265-1456: Head Height: 0.500 INCHES NOMINAL IN; Fastener Length: 1.000 INCHES NOMINAL IN; Surface Treatment Document and Classification: MIL-C-5541 MIL SPEC SINGLE TREATMENT RESPONSE HEAD; Thread Length: 1.000 INCHES MINIMUM IN. 14 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.