The Bolt,shear, cataloged under National Stock Number 5306-00-281-6734, 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 17 specifications, cited from the U.S. Government catalog. The record lists 16 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-281-6734 |
| Primary Part Number | ST3M571-5-8 |
| 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 | 1.037 INCHES MINIMUM AND 1.066 INCHES MAXIMUM IN |
| Extended Washer Diameter | 0.521 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN |
| Thread Length | 0.527 INCHES MINIMUM AND 0.576 INCHES MAXIMUM IN |
| 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 | 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) |
| 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 |
|---|---|
| BM3326-5-8 | Huck International, Inc (USA) |
| ST3M571-5-8 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| MB84-5-8 | Satair A/s (DNK) |
| MB84-5-8 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| VAL23033-5-8 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| AIC752-5-8 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| ST3M571-5-8 PRIMARY | The Boeing Company Div Defense (USA) |
| VS3060-5-8 | Fairchild Fasteners Europe - Vsd Gmbh (DEU) |
| GS1030-5-8 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| S11-1059-5-8 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| S371-5-8 | Huck International, Inc (USA) |
| MB84-5-8 | Hi-Shear Corporation (USA) |
| MB84-5-8 | Fairchild Fasteners Europe - Vsd Gmbh (DEU) |
| ST3M571-5-8 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| 74328-5-8 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| VS3060-5-8 | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| VS3060-5-8 | 5/9 Secondary reference U.S. Government activity |
| 74328-5-8 | 5/2 Secondary reference U.S. Government activity |
| A1C752-5-8 | 5/9 Secondary reference Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company |
| ST3M571-5-8 | 5/9 Secondary reference Pruitt Energy Sources Inc |
| S371-5-8 | 5/9 Secondary reference U.S. Government activity |
| BM3326-5-8 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-00-281-6734 is a Bolt,shear, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-281-6734 has 16 manufacturer part numbers on file: BM3326-5-8 (Huck International, Inc), ST3M571-5-8 (Fastener Innovation Technology, Inc. Dba F I T), MB84-5-8 (Satair A/s), MB84-5-8 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), VAL23033-5-8 (Valley-Todeco, Inc. Dba Arconic Fastening Systems) and 11 more.
Key specifications for ST3M571-5-8: 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: 1.037 INCHES MINIMUM AND 1.066 INCHES MAXIMUM IN; Extended Washer Diameter: 0.521 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN. 17 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.