The Bolt,machine, cataloged under National Stock Number 5306-01-133-0139, 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18 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-133-0139 |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Head Height | 0.162 INCHES MINIMUM AND 0.162 INCHES MINIMUM AND 0.182 INCHES MAXIMUM0.182 INCHES MAXIMUM IN |
| Fastener Length | 2.750 INCHES MINIMUM AND 2.750 INCHES MINIMUM AND 2.752 INCHES MAXIMUM2.752 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416 TYPE 2 CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALLQQ-P-416 TYPE 2 CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 2.688 INCHES MINIMUM AND 2.688 INCHES MINIMUM AND 2.721 INCHES MAXIMUM2.721 INCHES MAXIMUM IN |
| Hardness Rating | 26.0 ROCKWELL C MINIMUM AND 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL32.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Thread Diameter | 0.312 INCHES0.312 INCHES IN |
| Features Provided | FINISHED HEADFINISHED HEAD |
| Head Style | CROWNED HEXAGONCROWNED HEXAGON |
| Thread Direction | RIGHT-HANDRIGHT-HAND |
| Specification/standard Data | 80205-NAS428 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD80205-NAS428 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Grip Length | 0.031 INCHES MINIMUM AND 0.031 INCHES MINIMUM AND 0.062 INCHES MAXIMUM0.062 INCHES MAXIMUM IN |
| Width Between Flats | 0.490 INCHES MINIMUM AND 0.490 INCHES MINIMUM AND 0.502 INCHES MAXIMUM0.502 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM AND CADMIUM AND CHROMATE OVERALLCHROMATE OVERALL |
| Minimum Tensile Strength | 125000 POUNDS PER SQUARE INCH125000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A3A |
| Thread Quantity Per Inch | 2424 |
| Material | STEEL COMP 4037 OR STEEL COMP 4130 OR STEEL COMP 8630 OR STEEL COMP 8735 OR STEEL COMP 8740 OR STEEL COMP 4140 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF)UNIFIED NATIONAL JOINT FINE (UNJF) |
| 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 |
|---|---|
| NAS428-5-26 | 5/9 Secondary reference U.S. Government activity |
| NAS428-5A26 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-133-0139 is a Bolt,machine, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-01-133-0139: Head Height: 0.162 INCHES MINIMUM AND 0.162 INCHES MINIMUM AND 0.182 INCHES MAXIMUM0.182 INCHES MAXIMUM IN; Fastener Length: 2.750 INCHES MINIMUM AND 2.750 INCHES MINIMUM AND 2.752 INCHES MAXIMUM2.752 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416 TYPE 2 CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALLQQ-P-416 TYPE 2 CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 2.688 INCHES MINIMUM AND 2.688 INCHES MINIMUM AND 2.721 INCHES MAXIMUM2.721 INCHES MAXIMUM 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.