The Bolt,machine, cataloged under National Stock Number 5306-00-299-2791, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 13 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-299-2791 |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Head Height | 0.658 INCHES MINIMUM AND 0.780 INCHES MAXIMUM IN |
| Fastener Length | 4.500 INCHES NOMINAL IN |
| Thread Length | 2.500 INCHES MINIMUM IN |
| Material Document and Classification | QQ-N-281,CLASS A FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 1.125 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 81349-MIL-PRF-1222 GOVERNMENT SPECIFICATION |
| Width Between Flats | 1.756 INCHES MINIMUM AND 1.812 INCHES MAXIMUM IN |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 7 |
| Material | NICKEL ALLOY 400 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 |
|---|---|
| M1222B2N18C272NANN | 2/2 Government specification standardization U.S. Government activity |
| MIL-PRF-1222 | 4/1 Identification reference U.S. Government activity |
NSN 5306-00-299-2791 is a Bolt,machine, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-00-299-2791: Head Height: 0.658 INCHES MINIMUM AND 0.780 INCHES MAXIMUM IN; Fastener Length: 4.500 INCHES NOMINAL IN; Thread Length: 2.500 INCHES MINIMUM IN; Material Document and Classification: QQ-N-281,CLASS A FED SPEC SINGLE MATERIAL RESPONSE OVERALL. 13 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.