The Bolt,machine, cataloged under National Stock Number 5306-00-685-3750, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 20 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-685-3750 |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES THREADS |
| Surface Finish | 63.0 MICROINCHES GRIP |
| Surface Finish | 63.0 MICROINCHES BEARING SURFACE OF HEAD |
| Head Height | 0.203 INCHES MINIMUM AND 0.235 INCHES MAXIMUM IN |
| Fastener Length | 0.812 INCHES MINIMUM AND 0.859 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.640 INCHES NOMINAL IN |
| Material Document and Classification | QQ-A-225 FED SPEC ALL MATERIAL RESPONSES OVERALL |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Features Provided | FINISHED HEAD |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.172 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN |
| Width Between Flats | 0.553 INCHES MINIMUM AND 0.565 INCHES MAXIMUM IN |
| Surface Treatment | ANODIZE OVERALL |
| Minimum Tensile Strength | 62000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | ALUMINUM ALLOY 1100 OR ALUMINUM ALLOY 3003 OR ALUMINUM ALLOY 2011 OR ALUMINUM ALLOY 2014 OR ALUMINUM ALLOY 2017 OR ALUMINUM ALLOY 2024 OR ALUMINUM ALLOY 5052 OR ALUMINUM ALLOY 6061 OR ALUMINUM ALLOY 7075 OVERALL |
| Thread Series Designator | UNF |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| AN6DD6A | 5/9 Secondary reference U.S. Government activity |
| AN6DD6A | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-00-685-3750 is a Bolt,machine, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-00-685-3750: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 63.0 MICROINCHES GRIP; Surface Finish: 63.0 MICROINCHES BEARING SURFACE OF HEAD; Head Height: 0.203 INCHES MINIMUM AND 0.235 INCHES MAXIMUM IN. 20 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.