The Bolt,machine, cataloged under National Stock Number 5306-01-308-7441, 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16 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-308-7441 |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Head Height | 0.378 INCHES MINIMUM AND 0.444 INCHES MAXIMUM IN |
| Fastener Length | 3.150 INCHES MINIMUM AND 3.250 INCHES MAXIMUM IN |
| Thread Length | 1.500 INCHES NOMINAL IN |
| Hardness Rating | 32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | SAE J429 GR8 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.625 INCHES IN |
| Features Provided | FINISHED HEAD |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 1.031 INCHES MINIMUM AND 1.062 INCHES MAXIMUM IN |
| Nondefinitive Spec/std Data | 2 TYPE AND 8 GRADE |
| Minimum Tensile Strength | 150000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 11 |
| 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 |
|---|---|
| M1222B2X10C252GHNN | 2/2 Government specification standardization U.S. Government activity |
| 5/8-11UNC-2AX3.250 IN. LG, STL | 5/9 Secondary reference U.S. Government activity |
| MIL-S-1222 | 5/9 Secondary reference U.S. Government activity |
| MIL-DTL-1222 | 4/1 Identification reference U.S. Government activity |
NSN 5306-01-308-7441 is a Bolt,machine, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-01-308-7441: Head Height: 0.378 INCHES MINIMUM AND 0.444 INCHES MAXIMUM IN; Fastener Length: 3.150 INCHES MINIMUM AND 3.250 INCHES MAXIMUM IN; Thread Length: 1.500 INCHES NOMINAL IN; Hardness Rating: 32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL. 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.