The Screw,machine, cataloged under National Stock Number 5305-01-661-5099, 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 17 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 | 5305-01-661-5099 |
| Primary Part Number | 4256818 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Oshkosh Defense Llc |
| Status | ACTIVE |
| Extended Washer Thickness | 0.020 INCHES NOMINAL IN |
| Head Height | 0.090 INCHES NOMINAL IN |
| Screw Surface Treatment | ZINC |
| Fastener Length | 0.380 INCHES NOMINAL IN |
| Extended Washer Diameter | 0.290 INCHES NOMINAL IN |
| Thread Length | 0.380 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.1380 INCHES IN |
| Head Style | PAN |
| Thread Direction | RIGHT-HAND |
| Locking Feature | LOCKWASHER |
| Screw Material | STEEL |
| Internal Drive Style | CROSS RECESS TYPE II |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 32 |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.270 INCHES NOMINAL IN |
| Screw Surface Treatment Document and Classification | ASTM F1941 ASSN STD SINGLE TREATMENT RESPONSE |
| 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 |
|---|---|
| 4256818 PRIMARY | Oshkosh Defense Llc (USA) |
NSN 5305-01-661-5099 is a Screw,machine, manufactured by Oshkosh Defense Llc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-661-5099 has 1 manufacturer part number on file: 4256818 (Oshkosh Defense Llc).
Key specifications for 4256818: Extended Washer Thickness: 0.020 INCHES NOMINAL IN; Head Height: 0.090 INCHES NOMINAL IN; Screw Surface Treatment: ZINC; Fastener Length: 0.380 INCHES NOMINAL IN. 17 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.