The Bolt,shear, cataloged under National Stock Number 5306-00-280-3333, 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 10 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-280-3333 |
| Primary Part Number | ST3M571-6D14 |
| 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 | 1.474 INCHES MINIMUM AND 1.504 INCHES MAXIMUM IN |
| Extended Washer Diameter | 0.639 INCHES MINIMUM AND 0.649 INCHES MAXIMUM IN |
| Thread Length | 0.589 INCHES MINIMUM AND 0.639 INCHES MAXIMUM IN |
| Shank Unthreaded Hole Diameter | 0.106 INCHES MINIMUM AND 0.111 INCHES MAXIMUM FIRST HOLE IN |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | DOUBLE HEXAGON W/HOLE |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.865 INCHES MINIMUM AND 0.885 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) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 1.251 INCHES MINIMUM AND 1.291 INCHES MAXIMUM FIRST HOLE 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 |
|---|---|
| ST3M571-6D14 | Huck International, Inc (USA) |
| AIC752-6D14 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| VAL23033-6D14 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| ST3M571-6D14 PRIMARY | The Boeing Company Div Defense (USA) |
| 74328-6D14 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| ST3M571-6D14 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| MB84-6D14 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| MB84-6D14 | Hi-Shear Corporation (USA) |
| ST3M571-6D14 | J M Precision Inc (USA) |
| S11-1059-6D14 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| Reference | Meaning |
|---|---|
| ST3M571-6D14 | 5/2 Secondary reference U.S. Government activity |
| ST3M571-6D14 | 5/2 Secondary reference U.S. Government activity |
| ST3M571-6D14 | 5/9 Secondary reference Deutsch Fastener Corp |
| VS3060-6D14 | 5/9 Secondary reference U.S. Government activity |
| VS3060-6D14 | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
| S371-6D14 | 5/9 Secondary reference U.S. Government activity |
| BM3326-6D14 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| S371-6D14 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| BM3326-6D14 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-00-280-3333 is a Bolt,shear, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-280-3333 has 10 manufacturer part numbers on file: ST3M571-6D14 (Huck International, Inc), AIC752-6D14 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), VAL23033-6D14 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), ST3M571-6D14 (The Boeing Company Div Defense), 74328-6D14 (Sps Technologies, Llc Dba PB Fasteners) and 5 more.
Key specifications for ST3M571-6D14: 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: 1.474 INCHES MINIMUM AND 1.504 INCHES MAXIMUM IN; Extended Washer Diameter: 0.639 INCHES MINIMUM AND 0.649 INCHES MAXIMUM IN. 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.