The Screw,machine, cataloged under National Stock Number 5305-00-550-7181, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Army, United States Department of the Dba Rock Island Arsenal Jmtc. Government technical data includes 11 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 | 5305-00-550-7181 |
| Primary Part Number | 5507181 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Army, United States Department of the Dba Rock Island Arsenal Jmtc |
| Status | ACTIVE |
| Extended Washer Thickness | 0.375 INCHES NOMINAL IN |
| Head Height | 2.625 INCHES NOMINAL IN |
| Fastener Length | 22.375 INCHES NOMINAL IN |
| Extended Washer Diameter | 4.500 INCHES NOMINAL IN |
| Thread Length | 22.188 INCHES MINIMUM AND 22.312 INCHES MAXIMUM IN |
| Head Style | HEXAGON EXTENDED WASHER |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 3.844 INCHES MINIMUM AND 3.875 INCHES MAXIMUM IN |
| Screw Material | COPPER ALLOY |
| Nonstandard Thread Pitch Diameter | +3.7500 TO 3.7832 INCHES IN |
| Thread Series Designator | ACME |
| 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 |
|---|---|
| 5507181 PRIMARY | Army, United States Department of the Dba Rock Island Arsenal Jmtc (USA) |
NSN 5305-00-550-7181 is a Screw,machine, manufactured by Army, United States Department of the Dba Rock Island Arsenal Jmtc, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-550-7181 has 1 manufacturer part number on file: 5507181 (Army, United States Department of the Dba Rock Island Arsenal Jmtc).
Key specifications for 5507181: Extended Washer Thickness: 0.375 INCHES NOMINAL IN; Head Height: 2.625 INCHES NOMINAL IN; Fastener Length: 22.375 INCHES NOMINAL IN; Extended Washer Diameter: 4.500 INCHES NOMINAL IN. 11 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.