The Bolt,shear, cataloged under National Stock Number 5306-01-286-3507, 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 19 specifications, cited from the U.S. Government catalog. The record lists 15 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-286-3507 |
| Primary Part Number | ST3M571-7-26 |
| 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 | 2.315 INCHES MINIMUM AND 2.345 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| 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 |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.437 INCHES IN |
| Head Style | DOUBLE HEXAGON W/HOLE |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.615 INCHES MINIMUM AND 1.635 INCHES MAXIMUM IN |
| Width Between Flats | 0.502 INCHES NOMINAL 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 COMP XM-13 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 |
|---|---|
| ST3M571-7-26 | Heartland Precision Fasteners Inc (USA) |
| ST3M571-7-26 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| ST3M571-7-26 PRIMARY | The Boeing Company Div Defense (USA) |
| VAL23033-7-26 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| 74328-7-26 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| ST3M571-7-26 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| AIC752-7-26 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| MB84-7-26 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| BM3326-7-26 PRIMARY | Huck International, Inc (USA) |
| ST3M571-7-26 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| MB84-7-26 | Hi-Shear Corporation (USA) |
| VS3060-7-26 | Howmet Global Fastening Systems Inc (USA) |
| ST3M571-7-26 | Huck International, Inc (USA) |
| ST3M571-7-26 | Howmet Global Fastening Systems Inc (USA) |
| S11-1059-7-26 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| Reference | Meaning |
|---|---|
| VS3060-7-26 | 5/9 Secondary reference U.S. Government activity |
| ST3M571-7-26 | 5/9 Secondary reference Pruitt Energy Sources Inc |
| ST3M571-7-26 | 5/9 Secondary reference U.S. Government activity |
| 74328-7-26 | 5/9 Secondary reference U.S. Government activity |
| ST3M571-7-26 | 5/9 Secondary reference Sps Technologies Inc |
| S371-7-26 | 5/9 Secondary reference U.S. Government activity |
| BM3326-7-26 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-286-3507 is a Bolt,shear, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-286-3507 has 15 manufacturer part numbers on file: ST3M571-7-26 (Heartland Precision Fasteners Inc), ST3M571-7-26 (Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries), ST3M571-7-26 (The Boeing Company Div Defense), VAL23033-7-26 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), 74328-7-26 (Sps Technologies, Llc Dba PB Fasteners) and 10 more.
Key specifications for ST3M571-7-26: 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: 2.315 INCHES MINIMUM AND 2.345 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 19 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.