The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-352-8462, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Bek, Inc. Dba Level 1 Fasteners. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-352-8462 |
| Primary Part Number | 427531-1 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Bek, Inc. Dba Level 1 Fasteners |
| Status | ACTIVE |
| Width Across Flats | 0.312 INCHES MINIMUM AND 0.315 INCHES MAXIMUM IN |
| Head Height | 0.125 INCHES NOMINAL IN |
| Fastener Length | 0.875 INCHES NOMINAL IN |
| Thread Length | 0.707 INCHES NOMINAL IN |
| Material Document and Classification | MIL-S-5626 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-5000 MIL SPEC 2ND MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.562 INCHES IN |
| Head Style | FILLISTER |
| Thread Direction | RIGHT-HAND |
| Internal Drive Style | HEXAGON |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 12 |
| Material | STEEL COMP 4140 OR STEEL COMP E4340 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 1.000 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 427531-1 | Bek, Inc. Dba Level 1 Fasteners (USA) |
| 427531-1 | U.s.a. Spares Inc. (USA) |
| 427531-1 | Airtronics, Llc (USA) |
| Reference | Meaning |
|---|---|
| 427531-1 | 5/9 Secondary reference The Entwistle Company Llc |
| 427531-1 | 5/9 Secondary reference Computa-Base-Machining, Inc. |
| 427531-1 | 5/9 Secondary reference Honematic Machine Corporation Dba Pcx Aerosystems - Boylston Div Pcx Aerosystems - Boylston |
| 427531-1 | 5/9 Secondary reference Wellman Dynamics Machining and Assembly, Inc. |
| 427531-1 | 3/2 Design control — primary reference U.S. Government activity |
| 427531-1 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| 427531-1 | 5/9 Secondary reference Nuflo, Inc. |
| 427531-1 | 5/9 Secondary reference Gallo Bros Construction Inc |
NSN 5305-01-352-8462 is a Screw,cap,socket Head, manufactured by Bek, Inc. Dba Level 1 Fasteners, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-352-8462 has 3 manufacturer part numbers on file: 427531-1 (Bek, Inc. Dba Level 1 Fasteners), 427531-1 (U.s.a. Spares Inc.), 427531-1 (Airtronics, Llc).
Key specifications for 427531-1: Width Across Flats: 0.312 INCHES MINIMUM AND 0.315 INCHES MAXIMUM IN; Head Height: 0.125 INCHES NOMINAL IN; Fastener Length: 0.875 INCHES NOMINAL IN; Thread Length: 0.707 INCHES NOMINAL IN. 14 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.