The Setscrew, cataloged under National Stock Number 5305-01-658-9700, 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 16 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-658-9700 |
| Primary Part Number | 4180521001 |
| Item Name | Setscrew |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Oshkosh Defense Llc |
| Status | ACTIVE |
| Point Diameter | 0.194 INCHES MINIMUM AND 0.212 INCHES MAXIMUM IN |
| Width Across Flats | 0.1875 INCHES MINIMUM AND 0.1900 INCHES MAXIMUM IN |
| Fastener Length | 1.00 INCHES NOMINAL IN |
| Point Chamfer Angle | 118.0 DEGREES NOMINAL |
| Nominal Thread Diameter | 0.38 INCHES IN |
| Head Style | HEADLESS (SETSCREW) |
| Thread Direction | RIGHT-HAND |
| Point Style | CUP |
| Key Length | 0.188 INCHES MINIMUM IN |
| Color | BLACK OVERALL |
| Surface Treatment | PHOSPHATE ZINC OVERALL |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 16 |
| 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 |
|---|---|
| 4180521001 PRIMARY | Oshkosh Defense Llc (USA) |
| Reference | Meaning |
|---|---|
| 4180521 | D/9 Drawing number reference only Oshkosh Defense Llc |
NSN 5305-01-658-9700 is a Setscrew, manufactured by Oshkosh Defense Llc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-658-9700 has 1 manufacturer part number on file: 4180521001 (Oshkosh Defense Llc).
Key specifications for 4180521001: Point Diameter: 0.194 INCHES MINIMUM AND 0.212 INCHES MAXIMUM IN; Width Across Flats: 0.1875 INCHES MINIMUM AND 0.1900 INCHES MAXIMUM IN; Fastener Length: 1.00 INCHES NOMINAL IN; Point Chamfer Angle: 118.0 DEGREES NOMINAL. 16 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.