The Bolt,shear, cataloged under National Stock Number 5306-00-131-7218, 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16 specifications, cited from the U.S. Government catalog. 14 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-131-7218 |
| Item Name | Bolt,shear |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Extended Washer Thickness | 0.082 INCHES NOMINAL IN |
| Head Height | 0.348 INCHES NOMINAL IN |
| Fastener Length | 2.974 INCHES NOMINAL IN |
| Extended Washer Diameter | 0.521 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN |
| Thread Length | 0.589 INCHES MINIMUM AND 0.609 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-6049 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-8503 MIL SPEC 3RD MATERIAL RESPONSE OR MIL-S-5626 MIL SPEC 4TH MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | DOUBLE HEXAGON W/HOLE |
| Width Between Flats | 0.367 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN |
| Grip Diameter | 0.3110 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM IN |
| Minimum Tensile Strength | 180000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP E4340 OR STEEL COMP 8740 OR STEEL COMP 6150 OR STEEL COMP 4140 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 |
|---|---|
| MS21250-05038 | 2/2 Government specification standardization U.S. Government activity |
| MS21250-05038 | 5/9 Secondary reference Allen Mfg Co Sub of Chicago Pneumatic Tool Co |
| MS21250-05038 | 5/1 Secondary reference Valley-Todeco, Inc. Dba Arconic Fastening Systems |
| MS21250-05038 | 5/1 Secondary reference U.S. Government activity |
| MS21250-05038 | 5/1 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| MS21250-05038 | 5/1 Secondary reference U.S. Government activity |
| MS21250-05038 | 5/1 Secondary reference Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
| MS21250-05038 | 5/9 Secondary reference U.S. Government activity |
| MS21250-05038 | 5/9 Secondary reference Chandler Craftsman Controls |
| MS21250-05038 | 5/1 Secondary reference All Manufacturers, Inc. Dba Allied Harbor Aerospace Fasteners |
| MS21250-05038 | 5/1 Secondary reference Huck International, Inc |
| MS21250-05038 | 5/9 Secondary reference Mercury Aerospace Fasteners Inc |
| VFK100G-05038 | 5/1 Secondary reference Valley-Todeco, Inc. Dba Arconic Fastening Systems |
| MS21250-05038 | 5/1 Secondary reference Howmet Global Fastening Systems Inc |
NSN 5306-00-131-7218 is a Bolt,shear, classified under FSC 5306, Bolts. Status: active.
Key specifications for 5306-00-131-7218: Extended Washer Thickness: 0.082 INCHES NOMINAL IN; Head Height: 0.348 INCHES NOMINAL IN; Fastener Length: 2.974 INCHES NOMINAL IN; Extended Washer Diameter: 0.521 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN. 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.