The Bolt,shear, cataloged under National Stock Number 5306-00-281-7097, 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 18 specifications, cited from the U.S. Government catalog. The record lists 7 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-281-7097 |
| Primary Part Number | ST3M571-6-9 |
| Item Name | Bolt,shear |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Extended Washer Thickness | 0.081 INCHES MINIMUM AND 0.101 INCHES MAXIMUM IN |
| Head Height | 0.378 INCHES MINIMUM AND 0.398 INCHES MAXIMUM IN |
| Fastener Length | 1.151 INCHES MINIMUM AND 1.201 INCHES MAXIMUM IN |
| Extended Washer Diameter | 0.639 INCHES MINIMUM AND 0.649 INCHES MAXIMUM IN |
| Thread Length | 0.579 INCHES MINIMUM AND 0.649 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | DOUBLE HEXAGON W/HOLE |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 76301-ST3-571 MANUFACTURERS STANDARD |
| Grip Length | 0.552 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN |
| Width Between Flats | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN |
| Grip Diameter | 0.3740 INCHES MINIMUM AND 0.3745 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 |
|---|---|
| ST3M571-6-9 PRIMARY | The Boeing Company Div Defense (USA) |
| VAL23033-6-9 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| 47328-6-9 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| AIC752-6-9 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| ST3M571-6-9 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| S11-2059-6-9 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| ST3M571-6-9 | J M Precision Inc (USA) |
| Reference | Meaning |
|---|---|
| S371-6-9 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| HLS3060-6-9 | 5/2 Secondary reference U.S. Government activity |
| MB84-6-9 | 7/2 Vendor item drawing reference Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc |
| ST3M571-6-9 | 5/2 Secondary reference U.S. Government activity |
| S371-6-9 | 5/9 Secondary reference U.S. Government activity |
| BM3326-6-9 | 5/9 Secondary reference U.S. Government activity |
| MB84-6-9 | 7/2 Vendor item drawing reference Hi-Shear Corporation |
| BM3326-6-9 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
NSN 5306-00-281-7097 is a Bolt,shear, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-281-7097 has 7 manufacturer part numbers on file: ST3M571-6-9 (The Boeing Company Div Defense), VAL23033-6-9 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), 47328-6-9 (Sps Technologies, Llc Dba PB Fasteners), AIC752-6-9 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), ST3M571-6-9 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners) and 2 more.
Key specifications for ST3M571-6-9: Extended Washer Thickness: 0.081 INCHES MINIMUM AND 0.101 INCHES MAXIMUM IN; Head Height: 0.378 INCHES MINIMUM AND 0.398 INCHES MAXIMUM IN; Fastener Length: 1.151 INCHES MINIMUM AND 1.201 INCHES MAXIMUM IN; Extended Washer Diameter: 0.639 INCHES MINIMUM AND 0.649 INCHES MAXIMUM IN. 18 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.