The Bolt,machine, cataloged under National Stock Number 5306-01-260-7681, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 16 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-260-7681 |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Head Height | 8.0 MILLIMETERS NOMINAL MM |
| External Thread Tolerance Class | 66 |
| Fastener Length | 40.0 MILLIMETERS NOMINAL MM |
| Thread Pitch in Millimeters | 1.5 |
| Thread Length | 37.0 MILLIMETERS MINIMUM AND 40.0 MILLIMETERS MAXIMUM MM |
| Hardness Rating | 23.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Thread Diameter | 12.0 MILLIMETERS MM |
| Features Provided | FINISHED HEAD |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 19.0 MILLIMETERS NOMINAL MM |
| Color | RED OVERALL |
| Surface Treatment | DICHROMATE ZINC OVERALL |
| Minimum Tensile Strength | 116000 POUNDS PER SQUARE INCH LBS |
| Material | STEEL PROPERTY CLASS 8.8 OVERALL |
| Thread Series Designator | M |
| 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 |
|---|---|
| 909-640 | 5/9 Secondary reference Dorman Products, Inc. Dba Dorman |
| 428-640 | 3/9 Design control — primary reference Dorman Products, Inc. Dba Dorman |
NSN 5306-01-260-7681 is a Bolt,machine, classified under FSC 5306, Bolts. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 6515-01-572-3935. Verify interchangeability with system specifications before substitution.
Key specifications for 5306-01-260-7681: Head Height: 8.0 MILLIMETERS NOMINAL MM; External Thread Tolerance Class: 66; Fastener Length: 40.0 MILLIMETERS NOMINAL MM; Thread Pitch in Millimeters: 1.5. 16 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.