The Bolt,shear, cataloged under National Stock Number 5306-01-286-3506, 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 13 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-286-3506 |
| Primary Part Number | ST3M571-12H28 |
| Item Name | Bolt,shear |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Extended Washer Thickness | 0.168 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN |
| Head Height | 0.701 INCHES MINIMUM AND 0.721 INCHES MAXIMUM IN |
| Fastener Length | 2.787 INCHES MINIMUM AND 2.817 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Extended Washer Diameter | 1.220 INCHES MINIMUM AND 1.230 INCHES MAXIMUM IN |
| Thread Length | 1.027 INCHES MINIMUM AND 1.077 INCHES MAXIMUM IN |
| Hole Configuration Style | DOUBLE HEXAGON LONGITUDINAL HOLE |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.750 INCHES IN |
| Head Style | DOUBLE HEXAGON W/HOLE |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.740 INCHES MINIMUM AND 1.760 INCHES MAXIMUM IN |
| Width Between Flats | 0.814 INCHES NOMINAL IN |
| Grip Diameter | 0.7485 INCHES MINIMUM AND 0.7490 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 220000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 16 |
| Material | STEEL COMP XM-13 OVERALL |
| Hole Quantity | 4 |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Hole Type | DRILLED |
| Hole Diameter | 0.050 INCHES MINIMUM AND 0.060 INCHES MAXIMUM 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 |
|---|---|
| ST3M571-12H28 | J M Precision Inc (USA) |
| S11-1059-12H28 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| S371-12H28 | Huck International, Inc (USA) |
| ST3M571-12H28 PRIMARY | The Boeing Company Div Defense (USA) |
| ST3M571-12H28 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| VAL23033-12H28 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| MB84-12H28 | Hi-Shear Corporation (USA) |
| ST3M571-12H28 | Huck International, Inc (USA) |
| MB84-12H28 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M571-12H28 | Howmet Global Fastening Systems Inc (USA) |
| 74328-12H28 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| AIC752-12H28 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| 1138-12H28 | Reid Products Inc. Dba Reid Products Inc (USA) |
| Reference | Meaning |
|---|---|
| S371-12H28 | 5/9 Secondary reference U.S. Government activity |
| 74328-12H28 | 5/2 Secondary reference U.S. Government activity |
| BM3326-12H28 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| BM3326-12H28 | 5/9 Secondary reference U.S. Government activity |
| VS3060-12H28 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-286-3506 is a Bolt,shear, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-286-3506 has 13 manufacturer part numbers on file: ST3M571-12H28 (J M Precision Inc), S11-1059-12H28 (Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries), S371-12H28 (Huck International, Inc), ST3M571-12H28 (The Boeing Company Div Defense), ST3M571-12H28 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners) and 8 more.
Key specifications for ST3M571-12H28: Extended Washer Thickness: 0.168 INCHES MINIMUM AND 0.188 INCHES MAXIMUM IN; Head Height: 0.701 INCHES MINIMUM AND 0.721 INCHES MAXIMUM IN; Fastener Length: 2.787 INCHES MINIMUM AND 2.817 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC 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.