The Bolt,shear, cataloged under National Stock Number 5306-01-725-3429, 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 21 specifications, cited from the U.S. Government catalog. The record lists 11 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-725-3429 |
| Primary Part Number | ST3M571-4-40 |
| Item Name | Bolt,shear |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Extended Washer Thickness | 0.059 INCHES MINIMUM AND 0.079 INCHES MAXIMUM IN |
| Head Height | 0.290 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN |
| Fastener Length | 2.953 INCHES MINIMUM AND 2.983 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | AMS2700,METHOD 1 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Extended Washer Diameter | 0.428 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN |
| Thread Length | 0.468 INCHES NOMINAL IN |
| Shank Unthreaded Hole Diameter | 2.776 INCHES MINIMUM AND 2.876 INCHES MAXIMUM OVERALL IN |
| Material Document and Classification | AMS5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.2500 INCHES IN |
| Head Style | DOUBLE HEXAGON W/HOLE |
| Thread Direction | RIGHT-HAND |
| Grip Length | 2.50 INCHES NOMINAL IN |
| Width Between Flats | 0.313 INCHES NOMINAL IN |
| Grip Diameter | 0.2490 INCHES MINIMUM AND 0.2495 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 | 28 |
| 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 |
|---|---|
| ST3M571-4-40 | Saturn Fasteners Inc (USA) |
| ST3M571-4-40 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| S11-1059-4-40 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| VS3060-4-40 | Howmet Global Fastening Systems Inc (USA) |
| VAL23033-4-40 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| 11831-4-40 | Reid Products Inc. Dba Reid Products Inc (USA) |
| PBF1180-4-40 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| SLB253-4-40 | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| ST3M571-4-40 PRIMARY | The Boeing Company Div Defense (USA) |
| 74328-4-40 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| ST3M571-4-40 | Houston Precision Fasteners I Lp (USA) |
| Reference | Meaning |
|---|---|
| 74328-4-40 | 5/2 Secondary reference U.S. Government activity |
NSN 5306-01-725-3429 is a Bolt,shear, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-725-3429 has 11 manufacturer part numbers on file: ST3M571-4-40 (Saturn Fasteners Inc), ST3M571-4-40 (Fastener Innovation Technology, Inc. Dba F I T), S11-1059-4-40 (Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries), VS3060-4-40 (Howmet Global Fastening Systems Inc), VAL23033-4-40 (Valley-Todeco, Inc. Dba Arconic Fastening Systems) and 6 more.
Key specifications for ST3M571-4-40: Extended Washer Thickness: 0.059 INCHES MINIMUM AND 0.079 INCHES MAXIMUM IN; Head Height: 0.290 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN; Fastener Length: 2.953 INCHES MINIMUM AND 2.983 INCHES MAXIMUM IN; Surface Treatment Document and Classification: AMS2700,METHOD 1 ASSN STD SINGLE TREATMENT RESPONSE OVERALL. 21 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.