The Bolt,shear, cataloged under National Stock Number 5306-01-021-6839, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 22 specifications, cited from the U.S. Government catalog. The record lists 9 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-021-6839 |
| Primary Part Number | ST3M571-8H46 |
| Item Name | Bolt,shear |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Extended Washer Thickness | 0.113 INCHES MINIMUM AND 0.133 INCHES MAXIMUM IN |
| Head Height | 0.494 INCHES MINIMUM AND 0.514 INCHES MAXIMUM IN |
| Fastener Length | 3.627 INCHES MINIMUM AND 3.657 INCHES MAXIMUM IN |
| Extended Washer Diameter | 0.818 INCHES MINIMUM AND 0.828 INCHES MAXIMUM IN |
| Thread Length | 0.742 INCHES MINIMUM AND 0.792 INCHES MAXIMUM IN |
| Hole Configuration Style | DOUBLE HEXAGON LONGITUDINAL HOLE |
| Material Document and Classification | 23-112,MCDONNEL DOUGLAS CORP MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | DOUBLE HEXAGON W/HOLE |
| Thread Direction | RIGHT-HAND |
| Grip Length | 2.865 INCHES MINIMUM AND 2.885 INCHES MAXIMUM IN |
| Width Between Flats | 0.553 INCHES MINIMUM AND 0.564 INCHES MAXIMUM IN |
| Grip Diameter | 0.4990 INCHES MINIMUM AND 0.4995 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 220000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL OVERALL |
| Hole Quantity | 4 |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Hole Type | DRILLED |
| Hole Diameter | 0.055 INCHES NOMINAL 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 |
|---|---|
| MB84-8H46 | Hi-Shear Corporation (USA) |
| ST3M571-8H46 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| ST3M571-8H46 PRIMARY | The Boeing Company Div Defense (USA) |
| MB84-8H46 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| 11831-8H46 | Reid Products Inc. Dba Reid Products Inc (USA) |
| AIC752-8H46 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| VAL23033-8H46 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| GS1030-8H46 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| S11-1059-8H46 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| Reference | Meaning |
|---|---|
| VS3060-8H46 | 5/9 Secondary reference U.S. Government activity |
| S371-8H46 | 5/9 Secondary reference U.S. Government activity |
| 74328-8H46 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| BM3326-8H46 | 5/9 Secondary reference U.S. Government activity |
| 74328-8H46 | 5/2 Secondary reference U.S. Government activity |
NSN 5306-01-021-6839 is a Bolt,shear, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-021-6839 has 9 manufacturer part numbers on file: MB84-8H46 (Hi-Shear Corporation), ST3M571-8H46 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), ST3M571-8H46 (The Boeing Company Div Defense), MB84-8H46 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), 11831-8H46 (Reid Products Inc. Dba Reid Products Inc) and 4 more.
Key specifications for ST3M571-8H46: Extended Washer Thickness: 0.113 INCHES MINIMUM AND 0.133 INCHES MAXIMUM IN; Head Height: 0.494 INCHES MINIMUM AND 0.514 INCHES MAXIMUM IN; Fastener Length: 3.627 INCHES MINIMUM AND 3.657 INCHES MAXIMUM IN; Extended Washer Diameter: 0.818 INCHES MINIMUM AND 0.828 INCHES MAXIMUM IN. 22 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.