The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-381-1572, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 19 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-381-1572 |
| Primary Part Number | 5184129 PIECE 60 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Width Across Flats | 0.250 INCHES NOMINAL IN |
| Head Height | 0.306 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN |
| Fastener Length | 0.625 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | ASTM B633 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.514 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN |
| Hardness Rating | 39.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | FED 66 FED STD ALL MATERIAL RESPONSES OVERALL |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | ZINC OVERALL |
| Minimum Tensile Strength | 180000 POUNDS PER SQUARE INCH LBS |
| Minimum Yield Strength | 155000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 18 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.457 INCHES MINIMUM AND 0.469 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 |
|---|---|
| 5184129 PIECE 60 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 5305PL1283681 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 5305-01-381-1572 is a Screw,cap,socket Head, manufactured by Naval Sea Systems Command, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-381-1572 has 1 manufacturer part number on file: 5184129 PIECE 60 (Naval Sea Systems Command).
Key specifications for 5184129 PIECE 60: Width Across Flats: 0.250 INCHES NOMINAL IN; Head Height: 0.306 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN; Fastener Length: 0.625 INCHES NOMINAL IN; Surface Treatment Document and Classification: ASTM B633 ASSN STD SINGLE TREATMENT RESPONSE OVERALL. 19 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.