The Setscrew, cataloged under National Stock Number 5305-00-331-5321, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Lockheed Martin Corporation Div Rms - Mitchel Field. Government technical data includes 12 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. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-331-5321 |
| Primary Part Number | 301447 |
| Item Name | Setscrew |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Lockheed Martin Corporation Div Rms - Mitchel Field |
| Status | ACTIVE |
| Point Diameter | 0.090 INCHES MINIMUM AND 0.093 INCHES MAXIMUM IN |
| Head Height | 0.226 INCHES NOMINAL IN |
| Point Length | 0.093 INCHES NOMINAL IN |
| Fastener Length | 0.500 INCHES NOMINAL IN |
| Thread Length | 0.219 INCHES NOMINAL IN |
| Material Document and Classification | QQ-S-763,CL 7,TY A FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Point Style | FLAT |
| Internal Drive Style | SLOT |
| Material | STEEL COMP 303 OVERALL |
| Head Diameter | 0.248 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN |
| 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 |
|---|---|
| 301447 PRIMARY | Lockheed Martin Corporation Div Rms - Mitchel Field (USA) |
NSN 5305-00-331-5321 is a Setscrew, manufactured by Lockheed Martin Corporation Div Rms - Mitchel Field, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-331-5321 has 1 manufacturer part number on file: 301447 (Lockheed Martin Corporation Div Rms - Mitchel Field).
4 possible matches (shared part number, not a government interchangeability claim): 5365-01-170-6352, 5963-01-334-5859, 4010-01-398-2342. Verify interchangeability with system specifications before substitution.
Key specifications for 301447: Point Diameter: 0.090 INCHES MINIMUM AND 0.093 INCHES MAXIMUM IN; Head Height: 0.226 INCHES NOMINAL IN; Point Length: 0.093 INCHES NOMINAL IN; Fastener Length: 0.500 INCHES NOMINAL IN. 12 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.