The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-657-4350, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Oshkosh Defense Llc. Government technical data includes 14 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 | 5305-01-657-4350 |
| Primary Part Number | 4187584 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Oshkosh Defense Llc |
| Status | ACTIVE |
| Width Across Flats | 4.020 MILLIMETERS MINIMUM AND 4.095 MILLIMETERS MAXIMUM MM |
| Head Height | 4.82 MILLIMETERS NOMINAL MM |
| Fastener Length | 45.0 MILLIMETERS NOMINAL MM |
| Thread Pitch in Millimeters | 0.8 |
| Thread Length | 22.0 MILLIMETERS NOMINAL MM |
| Nominal Thread Diameter | 5.0 MILLIMETERS MM |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | ZINC OVERALL |
| Internal Drive Style | HEXAGON |
| Thread Class | 6G G |
| Material | STEEL PROPERTY CLASS 8.8 OVERALL |
| Thread Series Designator | M |
| Head Diameter | 8.28 MILLIMETERS MINIMUM AND 8.72 MILLIMETERS MAXIMUM 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 |
|---|---|
| 4187584 PRIMARY | Oshkosh Defense Llc (USA) |
NSN 5305-01-657-4350 is a Screw,cap,socket Head, manufactured by Oshkosh Defense Llc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-657-4350 has 1 manufacturer part number on file: 4187584 (Oshkosh Defense Llc).
Key specifications for 4187584: Width Across Flats: 4.020 MILLIMETERS MINIMUM AND 4.095 MILLIMETERS MAXIMUM MM; Head Height: 4.82 MILLIMETERS NOMINAL MM; Fastener Length: 45.0 MILLIMETERS NOMINAL MM; Thread Pitch in Millimeters: 0.8. 14 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.