The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-01-371-8458, 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 17 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-371-8458 |
| Primary Part Number | 0.37516UNC2A3.250T1G316SAA |
| Item Name | Screw,cap,hexagon Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Bek, Inc. Dba Level 1 Fasteners |
| Status | ACTIVE |
| Head Height | 0.226 INCHES MINIMUM AND 0.243 INCHES MAXIMUM IN |
| Fastener Length | 3.190 INCHES MINIMUM AND 3.250 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | ASTM A380 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 1.312 INCHES MAXIMUM IN |
| Material Document and Classification | ASTM F593 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.551 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN |
| Nondefinitive Spec/std Data | 1 TYPE |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 120000 POUNDS PER SQUARE INCH LBS |
| Minimum Yield Strength | 95000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 16 |
| Material | STEEL COMP 316 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 |
| Part Number | Manufacturer |
|---|---|
| 0.37516UNC2A3.250T1G316SAA | Bek, Inc. Dba Level 1 Fasteners (USA) |
| 0.37516UNC2A3.250T1G316SAA | Robbins Manufacturing Company, Inc. Dba Robbins Manufacturing Co Inc (USA) |
| 0.37516UNC2A3.250T1G316SAA | Quality Socket Screw Manufacturing Corp (USA) |
| 0.37516UNC2A3.250T1G316SAA | Fabrication Specialty Inc Dba Fabrication Specialty Inc (USA) |
| Reference | Meaning |
|---|---|
| MS35307-371 CRE S 316 | 5/9 Secondary reference Zf Industrieantriebe Witten Gmbh |
| 3/8-16UNC-2A X 3-1/4" TYI GR316 | 5/9 Secondary reference U.S. Government activity |
| MIL-S-1222 | 5/9 Secondary reference U.S. Government activity |
| MIL-DTL-1222 | 4/1 Identification reference U.S. Government activity |
NSN 5305-01-371-8458 is a Screw,cap,hexagon Head, manufactured by Bek, Inc. Dba Level 1 Fasteners, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-371-8458 has 4 manufacturer part numbers on file: 0.37516UNC2A3.250T1G316SAA (Bek, Inc. Dba Level 1 Fasteners), 0.37516UNC2A3.250T1G316SAA (Robbins Manufacturing Company, Inc. Dba Robbins Manufacturing Co Inc), 0.37516UNC2A3.250T1G316SAA (Quality Socket Screw Manufacturing Corp), 0.37516UNC2A3.250T1G316SAA (Fabrication Specialty Inc Dba Fabrication Specialty Inc).
Key specifications for 0.37516UNC2A3.250T1G316SAA: Head Height: 0.226 INCHES MINIMUM AND 0.243 INCHES MAXIMUM IN; Fastener Length: 3.190 INCHES MINIMUM AND 3.250 INCHES MAXIMUM IN; Surface Treatment Document and Classification: ASTM A380 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 1.312 INCHES MAXIMUM IN. 17 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.