The Bolt,machine, cataloged under National Stock Number 5306-01-526-0643, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 14 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-526-0643 |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Extended Washer Thickness | 1.8 MILLIMETERS NOMINAL MM |
| Head Height | 12.1 MILLIMETERS NOMINAL MM |
| External Thread Tolerance Class | 6G G |
| Fastener Length | 70.0 MILLIMETERS NOMINAL MM |
| Extended Washer Diameter | 24.7 MILLIMETERS NOMINAL MM |
| Thread Pitch in Millimeters | 1.75 |
| Thread Length | 31.25 MILLIMETERS MINIMUM AND 40.00 MILLIMETERS MAXIMUM MM |
| Material Document and Classification | SAE J1198 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM F568 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 12.0 MILLIMETERS MM |
| Head Style | HEXAGON EXTENDED WASHER |
| Thread Direction | LEFT-HAND |
| Width Between Flats | 14.57 MILLIMETERS MINIMUM AND 15.00 MILLIMETERS MAXIMUM MM |
| Material | STEEL PROPERTY CLASS 10.9 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 |
|---|---|
| B18234B12070N | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-526-0643 is a Bolt,machine, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-01-526-0643: Extended Washer Thickness: 1.8 MILLIMETERS NOMINAL MM; Head Height: 12.1 MILLIMETERS NOMINAL MM; External Thread Tolerance Class: 6G G; Fastener Length: 70.0 MILLIMETERS NOMINAL MM. 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.