The Bolt,shear, cataloged under National Stock Number 5306-01-021-6837, 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 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through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-021-6837 |
| Primary Part Number | ST3M571-5H8 |
| Item Name | Bolt,shear |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| 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 | 1.036 INCHES MINIMUM AND 1.066 INCHES MAXIMUM IN |
| Extended Washer Diameter | 0.521 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN |
| Thread Length | 0.526 INCHES MINIMUM AND 0.576 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 | 0.312 INCHES IN |
| Head Style | DOUBLE HEXAGON W/HOLE |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.490 INCHES MINIMUM AND 0.510 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 | 2200000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| 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 |
|---|---|
| VAL23033-5H8 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| MB84-5H8 | Hi-Shear Corporation (USA) |
| ST3M571-5H8 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| BM3326-5H8 | Huck International, Inc (USA) |
| ST3M571-5H8 PRIMARY | The Boeing Company Div Defense (USA) |
| ST3M571-5H8 | Reid Products Inc. Dba Reid Products Inc (USA) |
| MB84-5H8 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| S11-1059-5H8 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| AIC752-5H8 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| VS3060-5H8 | Howmet Global Fastening Systems Inc (USA) |
| ST3M571-5H8 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| ST3M571-5H8 | Heartland Precision Fasteners Inc (USA) |
| Reference | Meaning |
|---|---|
| RA22018-5H6 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| BM3326-5H8 | 5/9 Secondary reference U.S. Government activity |
| 74328-5H8 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| 10115667 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| S371-5H8 | 5/9 Secondary reference U.S. Government activity |
| 74328-5H8 | 5/2 Secondary reference U.S. Government activity |
| PBF23T5PH8 | 5/9 Secondary reference Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
| VS3060-5H8 | 5/9 Secondary reference U.S. Government activity |
| S371-5H8 | 5/9 Secondary reference Huck International, Inc |
NSN 5306-01-021-6837 is a Bolt,shear, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-021-6837 has 12 manufacturer part numbers on file: VAL23033-5H8 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), MB84-5H8 (Hi-Shear Corporation), ST3M571-5H8 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), BM3326-5H8 (Huck International, Inc), ST3M571-5H8 (The Boeing Company Div Defense) and 7 more.
Key specifications for ST3M571-5H8: 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: 1.036 INCHES MINIMUM AND 1.066 INCHES MAXIMUM IN; Extended Washer Diameter: 0.521 INCHES MINIMUM AND 0.531 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.