The Bolt,shear, cataloged under National Stock Number 5306-01-672-4354, 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 23 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-672-4354 |
| Primary Part Number | ST3M571-4H12 |
| Item Name | Bolt,shear |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Extended Washer Thickness | 0.069 INCHES NOMINAL IN |
| Head Height | 0.300 INCHES NOMINAL IN |
| Fastener Length | 1.218 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | AMS 2700, METHOD 1 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Extended Washer Diameter | 0.433 INCHES NOMINAL IN |
| Thread Length | 0.468 INCHES NOMINAL IN |
| Hole Configuration Style | DOUBLE HEXAGON LONGITUDINAL HOLE |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | DOUBLE HEXAGON W/HOLE |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.750 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 |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP XM-13 OVERALL |
| Hole Quantity | 4 |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Hole Type | DRILLED |
| Hole Diameter | 0.037 INCHES NOMINAL 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 |
|---|---|
| ST3M571-4H12 | Saturn Fasteners Inc (USA) |
| ST3M571-4H12 | Reid Products Inc. Dba Reid Products Inc (USA) |
| ST3M571-4H12 | Huck International, Inc (USA) |
| ST3M571-4H12 | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| ST3M571-4H12 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| ST3M571-4H12 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| ST3M571-4H12 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| ST3M571-4H12 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| ST3M571-4H12 | Heartland Precision Fasteners Inc (USA) |
| ST3M571-4H12 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| ST3M571-4H12 | Hi-Shear Corporation (USA) |
| ST3M571-4H12 | Howmet Global Fastening Systems Inc (USA) |
| ST3M571-4H12 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| ST3M571-4H12 | Houston Precision Fasteners I Lp (USA) |
| ST3M571-4H12 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| ST3M571-4H12 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| ST3M571-4H12 | 5/2 Secondary reference U.S. Government activity |
NSN 5306-01-672-4354 is a Bolt,shear, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-672-4354 has 16 manufacturer part numbers on file: ST3M571-4H12 (Saturn Fasteners Inc), ST3M571-4H12 (Reid Products Inc. Dba Reid Products Inc), ST3M571-4H12 (Huck International, Inc), ST3M571-4H12 (Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok), ST3M571-4H12 (Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries) and 11 more.
Key specifications for ST3M571-4H12: Extended Washer Thickness: 0.069 INCHES NOMINAL IN; Head Height: 0.300 INCHES NOMINAL IN; Fastener Length: 1.218 INCHES NOMINAL IN; Surface Treatment Document and Classification: AMS 2700, METHOD 1 ASSN STD SINGLE TREATMENT RESPONSE OVERALL. 23 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.