The Screw,externally Relieved Body, cataloged under National Stock Number 5305-00-482-4381, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Qioptiq Ltd. Government technical data includes 18 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 | 5305-00-482-4381 |
| Primary Part Number | 001621 |
| Item Name | Screw,externally Relieved Body |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Qioptiq Ltd |
| Status | ACTIVE |
| Head Height | 0.050 INCHES NOMINAL IN |
| Fastener Length | 0.855 INCHES MINIMUM AND 0.885 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | P.I.S.2015 FSCM K6111 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.355 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN |
| Material Document and Classification | ASTM A582 ASSN STD SINGLE MATERIAL RESPONSE OR B.S.970 EN58 FSCM K6111 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| First Diameter From Head | 0.119 INCHES MINIMUM AND 0.121 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.164 INCHES IN |
| Head Style | FILLISTER |
| Thread Direction | RIGHT-HAND |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.470 INCHES MINIMUM AND 0.530 INCHES MAXIMUM IN |
| Externally Relieved Body Diameter Quantity | 1 |
| Surface Treatment | DICHROMATE SODIUM OVERALL |
| Internal Drive Style | SLOT |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.295 INCHES MINIMUM AND 0.325 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 |
|---|---|
| 001621 PRIMARY | Qioptiq Ltd (GBR) |
NSN 5305-00-482-4381 is a Screw,externally Relieved Body, manufactured by Qioptiq Ltd, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-482-4381 has 1 manufacturer part number on file: 001621 (Qioptiq Ltd).
Key specifications for 001621: Head Height: 0.050 INCHES NOMINAL IN; Fastener Length: 0.855 INCHES MINIMUM AND 0.885 INCHES MAXIMUM IN; Surface Treatment Document and Classification: P.I.S.2015 FSCM K6111 MFR REF SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.355 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN. 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.