The Bolt,machine, cataloged under National Stock Number 5306-00-660-2745, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 18 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5306-00-660-2745 |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Head Height | 0.226 INCHES MINIMUM AND 0.268 INCHES MAXIMUM IN |
| Fastener Length | 2.000 INCHES NOMINAL IN |
| Thread Length | 1.000 INCHES MINIMUM IN |
| Hardness Rating | 95.0 ROCKWELL B MAXIMUM OVERALL |
| Material Document and Classification | SAE GR 1 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Features Provided | UNFINISHED HEAD |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.000 INCHES NOMINAL IN |
| Width Between Flats | 0.544 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN |
| Nondefinitive Spec/std Data | 2 TYPE |
| Surface Treatment | CADMIUM OVERALL |
| Minimum Tensile Strength | 55000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 16 |
| 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 |
| Reference | Meaning |
|---|---|
| FFB575 | 4/1 Identification reference U.S. Government activity |
NSN 5306-00-660-2745 is a Bolt,machine, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-00-660-2745: Head Height: 0.226 INCHES MINIMUM AND 0.268 INCHES MAXIMUM IN; Fastener Length: 2.000 INCHES NOMINAL IN; Thread Length: 1.000 INCHES MINIMUM IN; Hardness Rating: 95.0 ROCKWELL B MAXIMUM OVERALL. 18 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.