The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-059-0121, 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 15 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-059-0121 |
| Primary Part Number | 11664479 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Extended Washer Thickness | 0.220 INCHES NOMINAL IN |
| Width Across Flats | 0.640 INCHES NOMINAL IN |
| Head Height | 0.620 INCHES NOMINAL IN |
| Fastener Length | 2.300 INCHES NOMINAL IN |
| Extended Washer Diameter | 0.880 INCHES NOMINAL IN |
| Thread Length | 2.250 INCHES NOMINAL IN |
| Material Document and Classification | QQ-S-631 FED SPEC ALL MATERIAL RESPONSES OVERALL |
| Nominal Thread Diameter | 0.625 INCHES IN |
| Head Style | DOUBLE HEXAGON EXTENDED WASHER |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.640 INCHES NOMINAL IN |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 11 |
| Material | STEEL COMP 1030 OR STEEL COMP 1031 OR STEEL COMP 1033 OR STEEL COMP 1034 OR STEEL COMP 1035 OR STEEL COMP 1045 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| 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 |
|---|---|
| 11664479 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 5305010590121 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
NSN 5305-01-059-0121 is a Screw,cap,socket Head, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-059-0121 has 1 manufacturer part number on file: 11664479 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 11664479: Extended Washer Thickness: 0.220 INCHES NOMINAL IN; Width Across Flats: 0.640 INCHES NOMINAL IN; Head Height: 0.620 INCHES NOMINAL IN; Fastener Length: 2.300 INCHES NOMINAL IN. 15 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.