The Bolt,shear, cataloged under National Stock Number 5306-00-923-1241, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Mac Fasteners, Inc. Dba Mac Fasteners Inc. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 17 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-923-1241 |
| Primary Part Number | MS21250-08050 |
| Item Name | Bolt,shear |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Mac Fasteners, Inc. Dba Mac Fasteners Inc |
| Status | ACTIVE |
| Extended Washer Thickness | 0.123 INCHES NOMINAL IN |
| Head Height | 0.504 INCHES NOMINAL IN |
| Fastener Length | 3.913 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | QQ-P-416 TY 2 CL 3 FED SPEC ALL TREATMENT RESPONSES OVERALL |
| Extended Washer Diameter | 0.818 INCHES MINIMUM AND 0.828 INCHES MAXIMUM IN |
| Thread Length | 0.768 INCHES MINIMUM IN |
| Hardness Rating | 39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | DOUBLE HEXAGON W/HOLE |
| Thread Direction | RIGHT-HAND |
| Grip Length | 3.125 INCHES NOMINAL IN |
| Width Between Flats | 0.553 INCHES MINIMUM AND 0.564 INCHES MAXIMUM IN |
| Grip Diameter | 0.4985 INCHES MINIMUM AND 0.4995 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 | 20 |
| Material | STEEL COMP 8740 OR STEEL COMP E4340 OR STEEL COMP 4340 OR STEEL COMP 6150 OR STEEL COMP 4140 OVERALL |
| Thread Series Designator | UNF |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | F |
| Part Number | Manufacturer |
|---|---|
| MS21250-08050 | Mac Fasteners, Inc. Dba Mac Fasteners Inc (USA) |
| MS21250-08050 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| MS21250-08050 | Aerospace Manufacturing Corporation Dba Aerospace Manufacturing Inc (USA) |
| Reference | Meaning |
|---|---|
| MS21250-08050 | 5/9 Secondary reference Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
| MS21250-08050 | 5/9 Secondary reference U.S. Government activity |
| MS21250-08050 | 5/9 Secondary reference Allen Mfg Co Sub of Chicago Pneumatic Tool Co |
| MS21250-08050 | 5/9 Secondary reference Huck International, Inc |
| MS21250-08050 | 5/9 Secondary reference All Manufacturers, Inc. Dba Allied Harbor Aerospace Fasteners |
| VFK100G-08050 | 5/9 Secondary reference Valley-Todeco, Inc. Dba Arconic Fastening Systems |
| MS21250-08050 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| MS21250-08050 | 5/9 Secondary reference U.S. Government activity |
| NASM 21250-08050 | 5/9 Secondary reference U.S. Government activity |
| MS21250-08050 | 3/2 Design control — primary reference U.S. Government activity |
| MS21250-08050 | 5/9 Secondary reference Mercury Aerospace Fasteners Inc |
| MS21250-08050 | 5/9 Secondary reference U.S. Government activity |
| MS21250-08050 | 5/9 Secondary reference Valley-Todeco, Inc. Dba Arconic Fastening Systems |
| MS21250-08050 | 5/9 Secondary reference U.S. Government activity |
| MS21250-08050 | 5/9 Secondary reference Air World Mfg |
| MS21250-08050 | 5/9 Secondary reference Howmet Global Fastening Systems Inc |
| MS21250-08050 | 5/9 Secondary reference Hi-Shear Corporation |
NSN 5306-00-923-1241 is a Bolt,shear, manufactured by Mac Fasteners, Inc. Dba Mac Fasteners Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-923-1241 has 3 manufacturer part numbers on file: MS21250-08050 (Mac Fasteners, Inc. Dba Mac Fasteners Inc), MS21250-08050 (Fastener Innovation Technology, Inc. Dba F I T), MS21250-08050 (Aerospace Manufacturing Corporation Dba Aerospace Manufacturing Inc).
Key specifications for MS21250-08050: Extended Washer Thickness: 0.123 INCHES NOMINAL IN; Head Height: 0.504 INCHES NOMINAL IN; Fastener Length: 3.913 INCHES NOMINAL IN; Surface Treatment Document and Classification: QQ-P-416 TY 2 CL 3 FED SPEC ALL TREATMENT RESPONSES OVERALL. 19 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.