The Bolt,shear, cataloged under National Stock Number 5306-00-256-8682, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 21 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5306-00-256-8682 |
| Item Name | Bolt,shear |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Extended Washer Thickness | 0.259 INCHES MINIMUM AND 0.279 INCHES MAXIMUM IN |
| Head Height | 1.145 INCHES MINIMUM AND 1.165 INCHES MAXIMUM IN |
| Fastener Length | 7.807 INCHES MINIMUM AND 7.837 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | NAS 672 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Extended Washer Diameter | 2.115 INCHES MINIMUM AND 2.125 INCHES MAXIMUM IN |
| Thread Length | 1.505 INCHES MINIMUM AND 1.722 INCHES MAXIMUM IN |
| Hardness Rating | 39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | MIL-S-5000 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-5626 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 3RD MATERIAL RESPONSE OR MIL-S-8503 MIL SPEC 4TH MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 1.250 INCHES IN |
| Head Style | DOUBLE HEXAGON W/HOLE |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 80205-NAS640 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Grip Length | 6.115 INCHES MINIMUM AND 6.135 INCHES MAXIMUM IN |
| Width Between Flats | 1.308 INCHES MINIMUM AND 1.318 INCHES MAXIMUM IN |
| Grip Diameter | 1.2475 INCHES MINIMUM AND 1.2490 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Minimum Tensile Strength | 180000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 12 |
| Material | STEEL COMP E4340 OR STEEL COMP 4140 OR STEEL COMP 8740 OR STEEL COMP 6150 OVERALL |
| Thread Series Designator | 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 |
|---|---|
| NAS640-98 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-00-256-8682 is a Bolt,shear, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-00-256-8682: Extended Washer Thickness: 0.259 INCHES MINIMUM AND 0.279 INCHES MAXIMUM IN; Head Height: 1.145 INCHES MINIMUM AND 1.165 INCHES MAXIMUM IN; Fastener Length: 7.807 INCHES MINIMUM AND 7.837 INCHES MAXIMUM IN; Surface Treatment Document and Classification: NAS 672 ASSN STD SINGLE TREATMENT RESPONSE OVERALL. 21 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.