The Bolt,shear, cataloged under National Stock Number 5306-01-256-5188, 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 22 specifications, cited from the U.S. Government catalog. The record lists 14 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-256-5188 |
| Primary Part Number | ST3M571-5H7 |
| Item Name | Bolt,shear |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Extended Washer Thickness | 0.072 INCHES MINIMUM AND 0.092 INCHES MAXIMUM IN |
| Head Height | 0.338 INCHES MINIMUM AND 0.358 INCHES MAXIMUM IN |
| Fastener Length | 0.973 INCHES MINIMUM AND 1.003 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Extended Washer Diameter | 0.521 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN |
| Thread Length | 0.526 INCHES MINIMUM AND 0.576 INCHES MAXIMUM IN |
| Hole Configuration Style | DOUBLE HEXAGON LONGITUDINAL HOLE |
| Nominal Thread Diameter | 0.312 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 | 0.366 INCHES MINIMUM AND 0.386 INCHES MAXIMUM IN |
| Grip Diameter | 0.3115 INCHES MINIMUM AND 0.3120 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 |
|---|---|
| 74328-5H7 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| MB84-5H7 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| VS3060-5H7 | Howmet Global Fastening Systems Inc (USA) |
| AIC752-5H7 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| S11-1059-5H7 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| 11831-5H7 | Reid Products Inc. Dba Reid Products Inc (USA) |
| VAL23033-5H7 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| ST3M571-5H7 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| GS1030-5H7 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| SLB253-5H7 | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| MB84-5H7 | Hi-Shear Corporation (USA) |
| ST3M571-5H7 PRIMARY | The Boeing Company Div Defense (USA) |
| ST3M571-5H7 | Howmet Global Fastening Systems Inc (USA) |
| ST3M571-5H7 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| ST3M571-5H7 | 5/9 Secondary reference J M Precision Inc |
| VS3060-5H7 | 5/9 Secondary reference U.S. Government activity |
| S371-5H7 | 5/9 Secondary reference U.S. Government activity |
| ST3M571-5H7 | 5/9 Secondary reference Sps Technologies Inc |
| S371-5H7 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| BM3326-5H7 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| 74328-5H7 | 5/2 Secondary reference U.S. Government activity |
| BM3326-5H7 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-256-5188 is a Bolt,shear, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-256-5188 has 14 manufacturer part numbers on file: 74328-5H7 (Sps Technologies, Llc Dba PB Fasteners), MB84-5H7 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), VS3060-5H7 (Howmet Global Fastening Systems Inc), AIC752-5H7 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), S11-1059-5H7 (Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries) and 9 more.
Key specifications for ST3M571-5H7: Extended Washer Thickness: 0.072 INCHES MINIMUM AND 0.092 INCHES MAXIMUM IN; Head Height: 0.338 INCHES MINIMUM AND 0.358 INCHES MAXIMUM IN; Fastener Length: 0.973 INCHES MINIMUM AND 1.003 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.