The Bolt,shear, cataloged under National Stock Number 5306-00-288-2471, 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 10 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 10 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-288-2471 |
| Primary Part Number | ST3M571-7-19 |
| Item Name | Bolt,shear |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Extended Washer Thickness | 0.089 INCHES MINIMUM AND 0.109 INCHES MAXIMUM IN |
| Head Height | 0.425 INCHES MINIMUM AND 0.445 INCHES MAXIMUM IN |
| Fastener Length | 1.878 INCHES MINIMUM AND 1.908 INCHES MAXIMUM IN |
| Extended Washer Diameter | 0.740 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN |
| Thread Length | 0.680 INCHES MINIMUM AND 0.730 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.438 INCHES IN |
| Head Style | DOUBLE HEXAGON W/HOLE |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.178 INCHES MINIMUM AND 1.198 INCHES MAXIMUM IN |
| Width Between Flats | 0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN |
| Grip Diameter | 0.4365 INCHES MINIMUM AND 0.4370 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 |
|---|---|
| ST3M571-7-19 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| ST3M571-7-19 | Huck International, Inc (USA) |
| S11-1059-7-19 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| MB84-7-19 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| VAL23033-7-19 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| GS1030-7-19 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| ST3M571-7-19 PRIMARY | The Boeing Company Div Defense (USA) |
| 74328-7-19 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| AIC752-7-19 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| MB84-7-19 | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| S371-7-19 | 5/9 Secondary reference Huck International, Inc |
| BM3326-7-19 | 5/9 Secondary reference Huck International, Inc |
| ST3M571-7-19 | 5/9 Secondary reference U.S. Government activity |
| VAL203033-7-19 | 5/9 Secondary reference Valley-Todeco, Inc. Dba Arconic Fastening Systems |
| ST3M571-7-19 | 5/2 Secondary reference U.S. Government activity |
| ST3M571-7-19 | 5/9 Secondary reference J M Precision Inc |
| VS3060-7-19 | 5/9 Secondary reference U.S. Government activity |
| BM3326-7-19 | 5/9 Secondary reference U.S. Government activity |
| VS3060-7-19 | 5/9 Secondary reference Howmet Global Fastening Systems Inc |
| S371-7-19 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-00-288-2471 is a Bolt,shear, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-288-2471 has 10 manufacturer part numbers on file: ST3M571-7-19 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), ST3M571-7-19 (Huck International, Inc), S11-1059-7-19 (Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries), MB84-7-19 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), VAL23033-7-19 (Valley-Todeco, Inc. Dba Arconic Fastening Systems) and 5 more.
Key specifications for ST3M571-7-19: Extended Washer Thickness: 0.089 INCHES MINIMUM AND 0.109 INCHES MAXIMUM IN; Head Height: 0.425 INCHES MINIMUM AND 0.445 INCHES MAXIMUM IN; Fastener Length: 1.878 INCHES MINIMUM AND 1.908 INCHES MAXIMUM IN; Extended Washer Diameter: 0.740 INCHES MINIMUM AND 0.750 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.