The Screw,machine, cataloged under National Stock Number 5305-00-591-9231, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Army Weapons Command Attn Amswe-Ree-S. Government technical data includes 16 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-00-591-9231 |
| Primary Part Number | 421566 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Army Weapons Command Attn Amswe-Ree-S |
| Status | ACTIVE |
| Head Height | 0.067 INCHES MINIMUM AND 0.078 INCHES MAXIMUM IN |
| Screw Surface Treatment | CADMIUM OR ZINC |
| Fastener Length | 0.750 INCHES MAXIMUM IN |
| Screw Material Document and Classification | QQ-S-634 FED SPEC SINGLE MATERIAL RESPONSE |
| Thread Length | 0.750 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.099 INCHES IN |
| Head Style | ROUND |
| Thread Direction | RIGHT-HAND |
| Nondefinitive Spec/std Data | 1 TYPE AND 1S STYLE |
| Screw Material | STEEL COMP 1020 |
| Internal Drive Style | SLOT |
| Thread Class | 2A A |
| Test Data Document | 81348-FFS92 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.). |
| Thread Quantity Per Inch | 48 |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.169 INCHES MINIMUM AND 0.187 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 |
| Part Number | Manufacturer |
|---|---|
| 421566 | Army Weapons Command Attn Amswe-Ree-S (USA) |
| Reference | Meaning |
|---|---|
| P180785 | 5/9 Secondary reference American Telephone and Telegraph Co |
NSN 5305-00-591-9231 is a Screw,machine, manufactured by Army Weapons Command Attn Amswe-Ree-S, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-591-9231 has 1 manufacturer part number on file: 421566 (Army Weapons Command Attn Amswe-Ree-S).
Key specifications for 421566: Head Height: 0.067 INCHES MINIMUM AND 0.078 INCHES MAXIMUM IN; Screw Surface Treatment: CADMIUM OR ZINC; Fastener Length: 0.750 INCHES MAXIMUM IN; Screw Material Document and Classification: QQ-S-634 FED SPEC SINGLE MATERIAL RESPONSE. 16 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.