The Bolt,machine, cataloged under National Stock Number 5306-01-657-9657, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Oshkosh Defense Llc. Government technical data includes 14 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5306-01-657-9657 |
| Primary Part Number | 3970536006 |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Oshkosh Defense Llc |
| Status | ACTIVE |
| Head Height | 0.28 INCHES MAXIMUM IN |
| Fastener Length | 2.00 INCHES NOMINAL IN |
| Extended Washer Diameter | 0.56 INCHES MAXIMUM IN |
| Thread Length | 0.75 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.25 INCHES IN |
| Head Style | CHAMFER FLANGE |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.367 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN |
| Color | BLACK OVERALL |
| Surface Treatment | PHOSPHATE ZINC OVERALL |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL 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 |
|---|---|
| 3970536006 PRIMARY | Oshkosh Defense Llc (USA) |
| Reference | Meaning |
|---|---|
| 3970536 | D/9 Drawing number reference only Oshkosh Defense Llc |
NSN 5306-01-657-9657 is a Bolt,machine, manufactured by Oshkosh Defense Llc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-657-9657 has 1 manufacturer part number on file: 3970536006 (Oshkosh Defense Llc).
Key specifications for 3970536006: Head Height: 0.28 INCHES MAXIMUM IN; Fastener Length: 2.00 INCHES NOMINAL IN; Extended Washer Diameter: 0.56 INCHES MAXIMUM IN; Thread Length: 0.75 INCHES NOMINAL IN. 14 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.