The Bolt,shear, cataloged under National Stock Number 5306-00-283-7473, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Hi-Shear Corporation. Government technical data includes 20 specifications, cited from the U.S. Government catalog. The record lists 12 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-283-7473 |
| Primary Part Number | MB84-5D42 |
| Item Name | Bolt,shear |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Hi-Shear Corporation |
| 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 | 3.151 INCHES MINIMUM AND 3.201 INCHES MAXIMUM IN |
| Extended Washer Diameter | 0.521 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN |
| Thread Length | 0.516 INCHES MINIMUM AND 0.586 INCHES MAXIMUM IN |
| Shank Unthreaded Hole Diameter | 0.076 INCHES MINIMUM AND 0.081 INCHES MAXIMUM FIRST HOLE IN |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | DOUBLE HEXAGON W/HOLE |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 76301-ST3-571 MANUFACTURERS STANDARD |
| Grip Length | 2.615 INCHES MINIMUM AND 2.635 INCHES MAXIMUM IN |
| Width Between Flats | 0.367 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN |
| Grip Diameter | 0.3115 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 220000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 2.943 INCHES MINIMUM AND 3.003 INCHES MAXIMUM FIRST HOLE IN |
| 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 |
|---|---|
| ST3M571-5D42 | Heartland Precision Fasteners Inc (USA) |
| GS1030-5D42 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| MB84-5D42 PRIMARY | Hi-Shear Corporation (USA) |
| S11-1059-5D42 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| S371-5D42 | Huck International, Inc (USA) |
| AIC752-5D42 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| ST3M571-5D42 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| VAL23033-5D42 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| BM3326-5D42 | Huck International, Inc (USA) |
| ST3M571-5D42 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| VS3060-5D42 | Howmet Global Fastening Systems Inc (USA) |
| 74328-5D42 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| ST3M571-5D42 | 5/9 Secondary reference J M Precision Inc |
| ST3M571-5D42 | 5/2 Secondary reference U.S. Government activity |
| BM3326-5D42 | 5/9 Secondary reference U.S. Government activity |
| ST3M571-5D42 | 5/9 Secondary reference U.S. Government activity |
| VS3060-5D42 | 5/9 Secondary reference U.S. Government activity |
| ST3M571-5D42 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| ST3M571-5D42 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| ST3M571-5D42 | 5/2 Secondary reference U.S. Government activity |
| S371-5D42 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-00-283-7473 is a Bolt,shear, manufactured by Hi-Shear Corporation, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-283-7473 has 12 manufacturer part numbers on file: ST3M571-5D42 (Heartland Precision Fasteners Inc), GS1030-5D42 (B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace), MB84-5D42 (Hi-Shear Corporation), S11-1059-5D42 (Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries), S371-5D42 (Huck International, Inc) and 7 more.
Key specifications for MB84-5D42: 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: 3.151 INCHES MINIMUM AND 3.201 INCHES MAXIMUM IN; Extended Washer Diameter: 0.521 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN. 20 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.