The Bolt,internal Wrenching, cataloged under National Stock Number 5306-00-411-0730, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-411-0730 |
| Primary Part Number | 431B501-31 |
| Item Name | Bolt,internal Wrenching |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES HEAD |
| Width Across Flats | 0.562 INCHES MINIMUM AND 0.565 INCHES MAXIMUM IN |
| Head Height | 0.605 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN |
| Fastener Length | 3.000 INCHES NOMINAL IN |
| Thread Length | 1.000 INCHES MINIMUM IN |
| Material Document and Classification | C50A-400,GR B1601289,FSCM 24446 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| First Diameter From Head | 0.490 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.625 INCHES IN |
| Thread Direction | RIGHT-HAND |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 2.000 INCHES NOMINAL IN |
| Surface Treatment | COPPER AND CADMIUM OVERALL |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 11 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.988 INCHES MINIMUM AND 1.000 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 |
|---|---|
| 431B501-31 PRIMARY | Naval Sea Systems Command (USA) |
| 431B501-31 | General Electric Company (USA) |
| Reference | Meaning |
|---|---|
| 431B501PC31 | 5/9 Secondary reference General Electric Company |
| 431B501PC31 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-00-411-0730 is a Bolt,internal Wrenching, manufactured by Naval Sea Systems Command, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-411-0730 has 2 manufacturer part numbers on file: 431B501-31 (Naval Sea Systems Command), 431B501-31 (General Electric Company).
Key specifications for 431B501-31: Surface Finish: 63.0 MICROINCHES HEAD; Width Across Flats: 0.562 INCHES MINIMUM AND 0.565 INCHES MAXIMUM IN; Head Height: 0.605 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN; Fastener Length: 3.000 INCHES NOMINAL 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.