The Bolt,machine, cataloged under National Stock Number 5306-00-381-9237, 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20 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-381-9237 |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Head Height | 0.151 INCHES MINIMUM AND 0.161 INCHES MAXIMUM IN |
| Fastener Length | 0.275 INCHES MINIMUM AND 0.280 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | PS 3,TY 2,FSCM 19315 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.192 INCHES MINIMUM AND 0.280 INCHES MAXIMUM IN |
| Hardness Rating | 32.0 ROCKWELL C MINIMUM AND 36.0 ROCKWELL C MAXIMUM OVERALL |
| Hole Configuration Style | HEXAGON LONGITUDINAL HOLE |
| Material Document and Classification | MIL-S-5626,COND C4 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Features Provided | FINISHED HEAD |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP 4140 OVERALL |
| Hole Quantity | 6 |
| Thread Series Designator | UNF |
| Hole Type | DRILLED |
| Hole Diameter | 0.062 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 | X |
| Reference | Meaning |
|---|---|
| 646152 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-00-381-9237 is a Bolt,machine, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-00-381-9237: Head Height: 0.151 INCHES MINIMUM AND 0.161 INCHES MAXIMUM IN; Fastener Length: 0.275 INCHES MINIMUM AND 0.280 INCHES MAXIMUM IN; Surface Treatment Document and Classification: PS 3,TY 2,FSCM 19315 MFR REF SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.192 INCHES MINIMUM AND 0.280 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.