The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-01-666-0622, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Brothers Body and Equipment, Llc. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-666-0622 |
| Primary Part Number | MCMAS-91257A979 |
| Item Name | Screw,cap,hexagon Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Brothers Body and Equipment, Llc |
| Status | ACTIVE |
| Head Height | 0.672 INCHES NOMINAL IN |
| Fastener Length | 9.17 INCHES NOMINAL IN |
| Thread Length | 8.50 INCHES NOMINAL IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 1.50 INCHES NOMINAL IN |
| Surface Treatment | CHROMATE ZINC OVERALL |
| Minimum Tensile Strength | 150000 POUNDS PER SQUARE INCH LBS |
| Material | STEEL 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 |
|---|---|
| 91257A979 | Mcmaster-Carr Supply Co (USA) |
| MCMAS-91257A979 PRIMARY | Brothers Body and Equipment, Llc (USA) |
NSN 5305-01-666-0622 is a Screw,cap,hexagon Head, manufactured by Brothers Body and Equipment, Llc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-666-0622 has 2 manufacturer part numbers on file: 91257A979 (Mcmaster-Carr Supply Co), MCMAS-91257A979 (Brothers Body and Equipment, Llc).
Key specifications for MCMAS-91257A979: Head Height: 0.672 INCHES NOMINAL IN; Fastener Length: 9.17 INCHES NOMINAL IN; Thread Length: 8.50 INCHES NOMINAL IN; Head Style: HEXAGON. 10 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.