The Bolt,shear, cataloged under National Stock Number 5306-01-256-5189, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is M.s. Aerospace Inc. Dba Ms Aerospace Inc. 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-256-5189 |
| Primary Part Number | ST3M571-6H7 |
| Item Name | Bolt,shear |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | M.s. Aerospace Inc. Dba Ms Aerospace Inc |
| 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 | 1.036 INCHES MINIMUM AND 1.066 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| 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 |
| Hole Configuration Style | DOUBLE HEXAGON LONGITUDINAL HOLE |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | DOUBLE HEXAGON W/HOLE |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.427 INCHES MINIMUM AND 0.447 INCHES MAXIMUM IN |
| Width Between Flats | 0.429 INCHES MINIMUM AND 0.449 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 COMP XM-13 OVERALL |
| Hole Quantity | 4 |
| Thread Series Designator | UNF |
| 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 |
|---|---|
| ST3M571-6H7 | Heartland Precision Fasteners Inc (USA) |
| VAL23033-6H7 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| GS1030-6H7 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| AIC752-6H7 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| S371-6H7 | Huck International, Inc (USA) |
| ST3M571-6H7 PRIMARY | M.s. Aerospace Inc. Dba Ms Aerospace Inc (USA) |
| ST3M571-6H7 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| S11-1059-6H7 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| 11831-6H7 | Reid Products Inc. Dba Reid Products Inc (USA) |
| MB84-6H7 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M571-6H7 | Saturn Fasteners Inc (USA) |
| MB84-6H7 PRIMARY | Hi-Shear Corporation (USA) |
| ST3M571-6H7 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| 74328-6H7 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| BM3326-6H7 PRIMARY | Huck International, Inc (USA) |
| ST3M571-6H7 | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| 74328-6H7 | 5/2 Secondary reference U.S. Government activity |
| BM3326-6H7 | 5/9 Secondary reference U.S. Government activity |
| VS3060-6H7 | 5/9 Secondary reference U.S. Government activity |
| ST3M571-6H7 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| S371-6H7 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-256-5189 is a Bolt,shear, manufactured by M.s. Aerospace Inc. Dba Ms Aerospace Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-256-5189 has 16 manufacturer part numbers on file: ST3M571-6H7 (Heartland Precision Fasteners Inc), VAL23033-6H7 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), GS1030-6H7 (B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace), AIC752-6H7 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), S371-6H7 (Huck International, Inc) and 11 more.
Key specifications for ST3M571-6H7: 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: 1.036 INCHES MINIMUM AND 1.066 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED 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.