The Bolt,machine, cataloged under National Stock Number 5306-01-101-3158, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Howmet Global Fastening Systems Inc. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-101-3158 |
| Primary Part Number | VS3071F4-12D |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES THREADS |
| Surface Finish | 32.0 MICROINCHES GRIP |
| Surface Finish | 32.0 MICROINCHES BEARING SURFACE OF HEAD |
| Head Height | 0.154 INCHES MINIMUM AND 0.174 INCHES MAXIMUM IN |
| Fastener Length | 1.028 INCHES MINIMUM AND 1.058 INCHES MAXIMUM IN |
| Thread Length | 0.268 INCHES MINIMUM AND 0.318 INCHES MAXIMUM IN |
| Shank Unthreaded Hole Diameter | 0.075 INCHES MINIMUM AND 0.080 INCHES MAXIMUM FIRST HOLE IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Features Provided | FINISHED HEAD |
| Head Style | DOUBLE HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN |
| Width Between Flats | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP H11 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 0.915 INCHES MINIMUM AND 0.945 INCHES MAXIMUM FIRST HOLE 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 |
|---|---|
| VS3071F4-12D | Howmet Global Fastening Systems Inc (USA) |
| 549-4-12 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| AIC549-4-12 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| Reference | Meaning |
|---|---|
| VS3071F4-12D | 3/9 Design control — primary reference U.S. Government activity |
| 5306PL1497709 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| C7549-4-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-101-3158 is a Bolt,machine, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-101-3158 has 3 manufacturer part numbers on file: VS3071F4-12D (Howmet Global Fastening Systems Inc), 549-4-12 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), AIC549-4-12 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company).
Key specifications for VS3071F4-12D: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Surface Finish: 32.0 MICROINCHES BEARING SURFACE OF HEAD; Head Height: 0.154 INCHES MINIMUM AND 0.174 INCHES MAXIMUM IN. 19 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.