The Bolt,shear, cataloged under National Stock Number 5306-00-352-0470, 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 14 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-352-0470 |
| Primary Part Number | ST3M571-8-18 |
| 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 | 1.877 INCHES MINIMUM AND 1.907 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 |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | DOUBLE HEXAGON W/HOLE |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.115 INCHES MINIMUM AND 1.135 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 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 |
|---|---|
| ST3M571-8-18 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| MB84-8-18 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| VS3060-8-18 | Howmet Global Fastening Systems Inc (USA) |
| ATC752-8-18 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| 74328-8-18 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| VAL23033-8-18 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| ST3M571-8-18 PRIMARY | The Boeing Company Div Defense (USA) |
| S11-1059-8-18 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| GS1030-8-18 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| ST3M571-8-18 | Heartland Precision Fasteners Inc (USA) |
| ST3M571-8-18 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| BM3326-8-18 | Huck International, Inc (USA) |
| PBF23T8P18 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| MB84-8-18 | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| BM3326-8-18 | 5/9 Secondary reference U.S. Government activity |
| VS3060-8-18 | 5/9 Secondary reference U.S. Government activity |
| 74328-8-18 | 5/2 Secondary reference U.S. Government activity |
| S371-8-18 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-00-352-0470 is a Bolt,shear, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-352-0470 has 14 manufacturer part numbers on file: ST3M571-8-18 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), MB84-8-18 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), VS3060-8-18 (Howmet Global Fastening Systems Inc), ATC752-8-18 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), 74328-8-18 (Sps Technologies, Llc Dba PB Fasteners) and 9 more.
Key specifications for ST3M571-8-18: 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: 1.877 INCHES MINIMUM AND 1.907 INCHES MAXIMUM IN; Extended Washer Diameter: 0.818 INCHES MINIMUM AND 0.828 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.