The Screw,machine, cataloged under National Stock Number 5305-01-388-1791, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 17 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 | 5305-01-388-1791 |
| Primary Part Number | 12387301-234 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Head Height | 0.087 INCHES MINIMUM AND 0.097 INCHES MAXIMUM IN |
| Screw Surface Treatment | ZINC AND CHROMATE |
| Fastener Length | 1.000 INCHES NOMINAL IN |
| Screw Material Document and Classification | FED 66 FED STD ALL MATERIAL RESPONSES |
| Thread Length | 0.938 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.138 INCHES IN |
| Head Style | PAN |
| Thread Direction | RIGHT-HAND |
| Screw Material | STEEL |
| Color | BRONZE AND OLIVE DRAB |
| Minimum Tensile Strength | 60000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 32 |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.256 INCHES MINIMUM AND 0.270 INCHES MAXIMUM IN |
| Screw Surface Treatment Document and Classification | MIL-STD-171, 1.9.2.3 MIL SPEC SINGLE TREATMENT RESPONSE |
| 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 |
|---|---|
| 12387301-234 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
NSN 5305-01-388-1791 is a Screw,machine, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-388-1791 has 1 manufacturer part number on file: 12387301-234 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 12387301-234: Head Height: 0.087 INCHES MINIMUM AND 0.097 INCHES MAXIMUM IN; Screw Surface Treatment: ZINC AND CHROMATE; Fastener Length: 1.000 INCHES NOMINAL IN; Screw Material Document and Classification: FED 66 FED STD ALL MATERIAL RESPONSES. 17 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.