The Bolt,machine, cataloged under National Stock Number 5306-00-720-9177, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Austin-Westran Llc. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-720-9177 |
| Primary Part Number | 1151B1 |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Austin-Westran Llc |
| Status | ACTIVE |
| Head Height | 0.234 INCHES NOMINAL IN |
| Fastener Length | 1.750 INCHES NOMINAL IN |
| Thread Length | 1.750 INCHES MAXIMUM IN |
| Hardness Rating | 100.0 ROCKWELL B NOMINAL OVERALL |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Features Provided | CASEHARDENED AND FINISHED HEAD |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.562 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 80000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 16 |
| Material | STEEL CORROSION RESISTING 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 |
|---|---|
| 1151B1 PRIMARY | Austin-Westran Llc (USA) |
| Reference | Meaning |
|---|---|
| 1151B1 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-00-720-9177 is a Bolt,machine, manufactured by Austin-Westran Llc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-720-9177 has 1 manufacturer part number on file: 1151B1 (Austin-Westran Llc).
Key specifications for 1151B1: Head Height: 0.234 INCHES NOMINAL IN; Fastener Length: 1.750 INCHES NOMINAL IN; Thread Length: 1.750 INCHES MAXIMUM IN; Hardness Rating: 100.0 ROCKWELL B NOMINAL OVERALL. 15 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.