The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-588-8780, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Mcmaster-Carr Supply Company. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-588-8780 |
| Primary Part Number | 91239A149 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Mcmaster-Carr Supply Company |
| Status | ACTIVE |
| Width Across Flats | 2.5 MILLIMETERS NOMINAL MM |
| Head Height | 2.2 MILLIMETERS NOMINAL MM |
| Fastener Length | 7.6 MILLIMETERS NOMINAL MM |
| Thread Pitch in Millimeters | 0.7 |
| Thread Length | 14.0 MILLIMETERS NOMINAL MM |
| Hardness Rating | 32.0 ROCKWELL C MINIMUM OVERALL |
| Nominal Thread Diameter | 4.0 MILLIMETERS MM |
| Head Style | BUTTON |
| Thread Direction | RIGHT-HAND |
| Minimum Tensile Strength | 150800 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | HEXAGON |
| Thread Class | M4 |
| Material | STEEL OVERALL |
| Thread Series Designator | M |
| Head Diameter | 7.6 MILLIMETERS NOMINAL MM |
| 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 |
|---|---|
| 91239A149 PRIMARY | Mcmaster-Carr Supply Company (USA) |
NSN 5305-01-588-8780 is a Screw,cap,socket Head, manufactured by Mcmaster-Carr Supply Company, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-588-8780 has 1 manufacturer part number on file: 91239A149 (Mcmaster-Carr Supply Company).
Key specifications for 91239A149: Width Across Flats: 2.5 MILLIMETERS NOMINAL MM; Head Height: 2.2 MILLIMETERS NOMINAL MM; Fastener Length: 7.6 MILLIMETERS NOMINAL MM; Thread Pitch in Millimeters: 0.7. 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.