The Bolt,machine, cataloged under National Stock Number 5306-01-509-0638, 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14 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5306-01-509-0638 |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Extended Washer Thickness | 0.318 INCHES MINIMUM AND 0.338 INCHES MAXIMUM IN |
| Head Height | 0.740 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN |
| Fastener Length | 3.469 INCHES MINIMUM AND 3.531 INCHES MAXIMUM IN |
| Extended Washer Diameter | 1.107 INCHES MINIMUM AND 1.125 INCHES MAXIMUM IN |
| Material Document and Classification | ASTM A29 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.750 INCHES IN |
| Head Style | DOUBLE HEXAGON EXTENDED WASHER |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.745 INCHES MINIMUM AND 0.753 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 10 |
| Material | STEEL COMP 8640 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 |
| Reference | Meaning |
|---|---|
| 624254-1228N16 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-509-0638 is a Bolt,machine, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-01-509-0638: Extended Washer Thickness: 0.318 INCHES MINIMUM AND 0.338 INCHES MAXIMUM IN; Head Height: 0.740 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN; Fastener Length: 3.469 INCHES MINIMUM AND 3.531 INCHES MAXIMUM IN; Extended Washer Diameter: 1.107 INCHES MINIMUM AND 1.125 INCHES MAXIMUM 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.