The Screw,machine, cataloged under National Stock Number 5305-01-481-7550, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 18 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5305-01-481-7550 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Locking Feature Material Document and Classification | MIL-F-18240,250DEGREESFARHENHEITMAX/AMS3650,COLOROPTIONAL,390DEGREESFARHENHEITMAX MFR REF 1ST MATERIAL RESPONSE |
| Screw Surface Treatment | CADMIUM |
| Fastener Length | 0.500 INCHES MAXIMUM IN |
| Screw Material Document and Classification | NAS498 NATIONAL SPEC 1ST MATERIAL RESPONSE |
| Thread Length | 0.500 INCHES MAXIMUM IN |
| Locking Feature Material | PLASTIC POLYCHLOROTRIFLUOROETHYLENE |
| Nominal Thread Diameter | 0.1640 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 80205NAS1189 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Locking Feature | STRIP |
| Screw Material | STEEL |
| Minimum Tensile Strength | 1950 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Thread Series Designator | UNJC |
| Screw Surface Treatment Document and Classification | QQ-P-416,TYPE2,CLASS2 FED SPEC 1ST 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 |
| Reference | Meaning |
|---|---|
| NAS1189 | D/9 Drawing number reference only U.S. Government activity |
| NAS1189-08P8L | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-481-7550 is a Screw,machine, classified under FSC 5305, Screws. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 5305-01-510-6326, 5305-01-670-8498. Verify interchangeability with system specifications before substitution.
Key specifications for 5305-01-481-7550: Locking Feature Material Document and Classification: MIL-F-18240,250DEGREESFARHENHEITMAX/AMS3650,COLOROPTIONAL,390DEGREESFARHENHEITMAX MFR REF 1ST MATERIAL RESPONSE; Screw Surface Treatment: CADMIUM; Fastener Length: 0.500 INCHES MAXIMUM IN; Screw Material Document and Classification: NAS498 NATIONAL SPEC 1ST MATERIAL RESPONSE. 18 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.