The Setscrew, cataloged under National Stock Number 5305-00-253-4877, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Atlantic Inertial Systems Limited. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-253-4877 |
| Primary Part Number | 0447-132 |
| Item Name | Setscrew |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Atlantic Inertial Systems Limited |
| Status | ACTIVE |
| Width Across Flats | 0.050 INCHES MINIMUM AND 0.051 INCHES MAXIMUM IN |
| Fastener Length | 0.188 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | QQ-P-416,TY 2,CL 3 FED SPEC 1ST TREATMENT RESPONSE OR QQ-Z-325,TY 2,CL 3 FED SPEC 2ND TREATMENT RESPONSE OVERALL |
| Thread Length | 0.188 INCHES MAXIMUM IN |
| Hardness Rating | 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Thread Diameter | 0.112 INCHES IN |
| Head Style | HEADLESS (SETSCREW) |
| Thread Direction | RIGHT-HAND |
| Point Style | CUP |
| Nondefinitive Spec/std Data | 3 TYPE AND 4 STYLE |
| Surface Treatment | CADMIUM OR ZINC OVERALL |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 40 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 5305-00-253-4877 is a Setscrew, manufactured by Atlantic Inertial Systems Limited, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-253-4877 has 2 manufacturer part numbers on file: 0447-132 (Atlantic Inertial Systems Limited), 0447-130 (Lockheed Martin Corporation Div Rms - Mitchel Field).
Key specifications for 0447-132: Width Across Flats: 0.050 INCHES MINIMUM AND 0.051 INCHES MAXIMUM IN; Fastener Length: 0.188 INCHES NOMINAL IN; Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 3 FED SPEC 1ST TREATMENT RESPONSE OR QQ-Z-325,TY 2,CL 3 FED SPEC 2ND TREATMENT RESPONSE OVERALL; Thread Length: 0.188 INCHES MAXIMUM IN. 16 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.