The Screw,machine, cataloged under National Stock Number 5305-00-285-4591, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Us Army Aviation and Missile Command. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-285-4591 |
| Primary Part Number | 811091 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Us Army Aviation and Missile Command |
| Status | ACTIVE |
| Head Height | 0.071 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN |
| Screw Surface Treatment | CADMIUM OR ZINC |
| Fastener Length | 0.500 INCHES NOMINAL IN |
| Thread Length | 0.438 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.138 INCHES IN |
| Head Style | BINDING |
| Thread Direction | RIGHT-HAND |
| Screw Material | STEEL COMP 1010 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 32 |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.275 INCHES MINIMUM AND 0.290 INCHES MAXIMUM IN |
| Screw Surface Treatment Document and Classification | QQ-P-416,TY 1,CL 3 FED SPEC 1ST TREATMENT RESPONSE OR QQ-Z-325,TY 1,CL 3 FED SPEC 2ND 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 |
|---|---|
| 811091 | Us Army Aviation and Missile Command (USA) |
| Reference | Meaning |
|---|---|
| FFS92TYPEISTYLE8S | 4/1 Identification reference U.S. Government activity |
| 100B5SC6-8 | 5/2 Secondary reference U.S. Government activity |
NSN 5305-00-285-4591 is a Screw,machine, manufactured by Us Army Aviation and Missile Command, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-285-4591 has 1 manufacturer part number on file: 811091 (Us Army Aviation and Missile Command).
1 possible match (shared part number, not a government interchangeability claim): 6940-00-347-0325. Verify interchangeability with system specifications before substitution.
Key specifications for 811091: Head Height: 0.071 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN; Screw Surface Treatment: CADMIUM OR ZINC; Fastener Length: 0.500 INCHES NOMINAL IN; Thread Length: 0.438 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN. 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.