The Bolt,shear, cataloged under National Stock Number 5306-00-949-3769, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Leonardo Spa Aeronautics Division - Pomigliano D'arco Site. Government technical data includes 21 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 15 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-949-3769 |
| Primary Part Number | MS21250-05018 |
| Item Name | Bolt,shear |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Leonardo Spa Aeronautics Division - Pomigliano D'arco Site |
| Status | ACTIVE |
| Extended Washer Thickness | 0.072 INCHES MINIMUM AND 0.092 INCHES MAXIMUM IN |
| Head Height | 0.338 INCHES MINIMUM AND 0.358 INCHES MAXIMUM IN |
| Fastener Length | 1.714 INCHES MINIMUM AND 1.734 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Extended Washer Diameter | 0.521 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN |
| Thread Length | 0.579 INCHES MINIMUM AND 0.619 INCHES MAXIMUM IN |
| Hardness Rating | 39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | MIL-S-5626 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-5000 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-8503 MIL SPEC 3RD MATERIAL RESPONSE OR MIL-S-6098 MIL SPEC 4TH MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 5TH MATERIAL RESPONSE OVERALL |
| Single Shear Strength | ERR-060 |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | DOUBLE HEXAGON W/HOLE |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.115 INCHES MINIMUM AND 1.135 INCHES MAXIMUM IN |
| 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 |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Minimum Tensile Strength | 180000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP 4140 OR STEEL COMP E4340 OR STEEL COMP 6150 OR STEEL COMP 8735 OR STEEL COMP 8740 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 |
| Part Number | Manufacturer |
|---|---|
| MS21250-05018 | Leonardo Spa Aeronautics Division - Pomigliano D'arco Site (ITA) |
| MS21250-05018 | Fairchild Fasteners Europe - Vsd Gmbh (DEU) |
| Reference | Meaning |
|---|---|
| MS21250-05018 | 5/9 Secondary reference Allen Mfg Co Sub of Chicago Pneumatic Tool Co |
| MS21250-05018 | 5/9 Secondary reference Mercury Aerospace Fasteners Inc |
| MS21250-05018 | 3/2 Design control — primary reference U.S. Government activity |
| MS21250-05018 | 5/1 Secondary reference U.S. Government activity |
| MS21250-05018 | 5/9 Secondary reference U.S. Government activity |
| MS21250-05018 | 5/1 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| MS21250-05018 | 5/1 Secondary reference U.S. Government activity |
| MS21250-05018 | 5/1 Secondary reference Howmet Global Fastening Systems Inc |
| VFK100G-05018 | 5/1 Secondary reference Valley-Todeco, Inc. Dba Arconic Fastening Systems |
| MS21250-05018 | 5/1 Secondary reference Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
| 5306PL0946402 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| MS21250-05018 | 5/9 Secondary reference Chandler Craftsman Controls |
| MS21250-05018 | 5/9 Secondary reference U.S. Government activity |
| MS21250-05018 | 5/1 Secondary reference Valley-Todeco, Inc. Dba Arconic Fastening Systems |
| MS21250-05018 | 5/1 Secondary reference All Manufacturers, Inc. Dba Allied Harbor Aerospace Fasteners |
NSN 5306-00-949-3769 is a Bolt,shear, manufactured by Leonardo Spa Aeronautics Division - Pomigliano D'arco Site, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-949-3769 has 2 manufacturer part numbers on file: MS21250-05018 (Leonardo Spa Aeronautics Division - Pomigliano D'arco Site), MS21250-05018 (Fairchild Fasteners Europe - Vsd Gmbh).
Key specifications for MS21250-05018: Extended Washer Thickness: 0.072 INCHES MINIMUM AND 0.092 INCHES MAXIMUM IN; Head Height: 0.338 INCHES MINIMUM AND 0.358 INCHES MAXIMUM IN; Fastener Length: 1.714 INCHES MINIMUM AND 1.734 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 3 FED SPEC 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.