The Bolt,machine, cataloged under National Stock Number 5306-00-807-8381, 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18 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5306-00-807-8381 |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Head Height | 0.750 INCHES MINIMUM AND 0.812 INCHES MAXIMUM IN |
| Fastener Length | 8.500 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | QQ-P-416 TY 2 CL 3 FED SPEC ALL TREATMENT RESPONSES OVERALL |
| Thread Length | 3.000 INCHES MINIMUM IN |
| Hardness Rating | 34.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | MIL-S-5000 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 1.250 INCHES IN |
| Features Provided | FINISHED HEAD |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 5.500 INCHES NOMINAL IN |
| Width Between Flats | 1.875 INCHES NOMINAL IN |
| Nonstandard Thread Pitch Diameter | +1.4141 TO 1.4235 INCHES IN |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Minimum Tensile Strength | 158000 POUNDS PER SQUARE INCH LBS |
| Thread Quantity Per Inch | 5 |
| Material | STEEL COMP E4340 OR STEEL COMP 4340 OVERALL |
| Thread Series Designator | UNS |
| 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 |
|---|---|
| 317658-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-00-807-8381 is a Bolt,machine, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-00-807-8381: Head Height: 0.750 INCHES MINIMUM AND 0.812 INCHES MAXIMUM IN; Fastener Length: 8.500 INCHES NOMINAL IN; Surface Treatment Document and Classification: QQ-P-416 TY 2 CL 3 FED SPEC ALL TREATMENT RESPONSES OVERALL; Thread Length: 3.000 INCHES MINIMUM IN. 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.