The Bolt,shear, cataloged under National Stock Number 5306-01-436-3737, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies Llc Dba PB Fasteners Div PB Fasteners. Government technical data includes 18 specifications, cited from the U.S. Government catalog. The record lists 11 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-436-3737 |
| Primary Part Number | ST3M571-6D68 |
| Item Name | Bolt,shear |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
| 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 | 4.849 INCHES MINIMUM AND 4.879 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 | 0.614 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | DOUBLE HEXAGON W/HOLE |
| Thread Direction | RIGHT-HAND |
| Grip Length | 4.250 INCHES NOMINAL IN |
| Width Between Flats | 0.439 INCHES NOMINAL 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 |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| 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 |
|---|---|
| BM3326-6D68 | Huck International, Inc (USA) |
| MB84-6D68 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| AIC752-6D68 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| S11-1059-6D68 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| ST3M571-6D68 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| ST3M571-6D68 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| VS3060-6D68 | Howmet Global Fastening Systems Inc (USA) |
| VAL23033-6D68 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| MB84-6D68 | Hi-Shear Corporation (USA) |
| ST3M571-6D68 | Heartland Precision Fasteners Inc (USA) |
| 74328-6D68 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| ST3M571-6D68 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| VS3060-6D68 | 5/9 Secondary reference U.S. Government activity |
| AIC752-6-68 | 5/9 Secondary reference Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company |
| S371-6D68 | 5/9 Secondary reference U.S. Government activity |
| 74328-6D68 | 5/2 Secondary reference U.S. Government activity |
NSN 5306-01-436-3737 is a Bolt,shear, manufactured by Sps Technologies Llc Dba PB Fasteners Div PB Fasteners, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-436-3737 has 11 manufacturer part numbers on file: BM3326-6D68 (Huck International, Inc), MB84-6D68 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), AIC752-6D68 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), S11-1059-6D68 (Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries), ST3M571-6D68 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners) and 6 more.
Key specifications for ST3M571-6D68: 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: 4.849 INCHES MINIMUM AND 4.879 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 18 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.