The Bolt,shear, cataloged under National Stock Number 5306-01-723-2705, 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 22 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-723-2705 |
| Primary Part Number | ST3M571-6D9 |
| 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 1.101 INCHES MAXIMUM IN |
| Head Height | 0.378 INCHES MINIMUM AND 0.398 INCHES MAXIMUM IN |
| Fastener Length | 1.1615 INCHES MINIMUM AND 1.1915 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | AMS270 METHOD 1 NATIONAL STD/SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Extended Washer Diameter | 0.639 INCHES MINIMUM AND 0.649 INCHES MAXIMUM IN |
| Thread Length | 0.614 INCHES NOMINAL IN |
| Shank Unthreaded Hole Diameter | 0.106 INCHES MINIMUM AND 0.111 INCHES MAXIMUM OVERALL IN |
| Material Document and Classification | AMS 5629 AEROSPACE MATERIAL SPEC STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | DOUBLE HEXAGON W/HOLE |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.5625 INCHES MINIMUM IN |
| Width Between Flats | 0.439 INCHES NOMINAL 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 |
| Chamfer Angle | 45.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 0.9535 INCHES MINIMUM AND 0.9635 INCHES MAXIMUM OVERALL IN |
| 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 |
|---|---|
| ST3M571-6D9 | Saturn Fasteners Inc (USA) |
| S11-1059-6D9 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| ST3M571-6D9 PRIMARY | The Boeing Company Div Defense (USA) |
| BM3326-6D9 | Huck International, Inc (USA) |
| MB84-6D9 | Hi-Shear Corporation (USA) |
| PBF1180-6D9 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| GS1030-6D9 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| AIC752-6D9 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| ST3M571-6D9 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| SLB253-6D9 | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| 11831-6D9 | Reid Products Inc. Dba Reid Products Inc (USA) |
| ST3M571-6D9 | Houston Precision Fasteners I Lp (USA) |
| VAL23033-6D9 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| HP7571-6D9 | Heartland Precision Fasteners Inc (USA) |
| 74328-6D9 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| VS3060-6D9 | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| 74328-6D9 | 5/2 Secondary reference U.S. Government activity |
| ST3M571 | D/9 Drawing number reference only The Boeing Company Div Defense |
NSN 5306-01-723-2705 is a Bolt,shear, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-723-2705 has 16 manufacturer part numbers on file: ST3M571-6D9 (Saturn Fasteners Inc), S11-1059-6D9 (Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries), ST3M571-6D9 (The Boeing Company Div Defense), BM3326-6D9 (Huck International, Inc), MB84-6D9 (Hi-Shear Corporation) and 11 more.
Key specifications for ST3M571-6D9: Extended Washer Thickness: 0.081 INCHES MINIMUM AND 1.101 INCHES MAXIMUM IN; Head Height: 0.378 INCHES MINIMUM AND 0.398 INCHES MAXIMUM IN; Fastener Length: 1.1615 INCHES MINIMUM AND 1.1915 INCHES MAXIMUM IN; Surface Treatment Document and Classification: AMS270 METHOD 1 NATIONAL STD/SPEC SINGLE TREATMENT RESPONSE OVERALL. 22 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.