The Bolt,shear, cataloged under National Stock Number 5306-01-079-1364, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Hi-Shear Corporation. Government technical data includes 20 specifications, cited from the U.S. Government catalog. The record lists 12 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through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-079-1364 |
| Primary Part Number | ST3M571-8D88 |
| Item Name | Bolt,shear |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Extended Washer Thickness | 0.113 INCHES MINIMUM AND 0.133 INCHES MAXIMUM IN |
| Head Height | 0.494 INCHES MINIMUM AND 0.514 INCHES MAXIMUM IN |
| Fastener Length | 6.252 INCHES MINIMUM AND 6.282 INCHES MAXIMUM IN |
| Extended Washer Diameter | 0.818 INCHES MINIMUM AND 0.828 INCHES MAXIMUM IN |
| Thread Length | 0.742 INCHES MINIMUM AND 0.792 INCHES MAXIMUM IN |
| Shank Unthreaded Hole Diameter | 0.106 INCHES MINIMUM AND 0.111 INCHES MAXIMUM FIRST HOLE IN |
| Material Document and Classification | 23-112,TY A,FSCM 76301 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | DOUBLE HEXAGON W/HOLE |
| Thread Direction | RIGHT-HAND |
| Grip Length | 5.490 INCHES MINIMUM AND 5.510 INCHES MAXIMUM IN |
| Width Between Flats | 0.553 INCHES MINIMUM AND 0.564 INCHES MAXIMUM IN |
| Grip Diameter | 0.4990 INCHES MINIMUM AND 0.4995 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 220000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 6.006 INCHES MINIMUM AND 6.046 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 |
|---|---|
| BM3326-8D88 | Huck International, Inc (USA) |
| VS3060-8D88 | Howmet Global Fastening Systems Inc (USA) |
| AIC752-8D88 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| ST3M571-8D88 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| VAL23033-8D88 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| ST3M571-8D88 | Twist Tite Mfg, Inc Dba Twist Tite Manufacturing Inc (USA) |
| ST3M571-8D88 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| GS1030-8D88 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| ST3M571-8D88 PRIMARY | Hi-Shear Corporation (USA) |
| MB84-8D88 | Hi-Shear Corporation (USA) |
| ST3M571-8D88 | Howmet Global Fastening Systems Inc (USA) |
| S11-1059-8D88 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| Reference | Meaning |
|---|---|
| S371-8D88 | 5/9 Secondary reference Huck International, Inc |
| VS3060-8D88 | 5/9 Secondary reference U.S. Government activity |
| ST3M571-8D88 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| ST3M571-8D88 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| ST3M571-3D88 | 5/9 Secondary reference Heartland Precision Fasteners Inc |
| 74328-8D88 | 5/2 Secondary reference U.S. Government activity |
| 74328-8D88 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| S371-8D88 | 5/9 Secondary reference U.S. Government activity |
| BM3326-8D88 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-079-1364 is a Bolt,shear, manufactured by Hi-Shear Corporation, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-079-1364 has 12 manufacturer part numbers on file: BM3326-8D88 (Huck International, Inc), VS3060-8D88 (Howmet Global Fastening Systems Inc), AIC752-8D88 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), ST3M571-8D88 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), VAL23033-8D88 (Valley-Todeco, Inc. Dba Arconic Fastening Systems) and 7 more.
Key specifications for ST3M571-8D88: Extended Washer Thickness: 0.113 INCHES MINIMUM AND 0.133 INCHES MAXIMUM IN; Head Height: 0.494 INCHES MINIMUM AND 0.514 INCHES MAXIMUM IN; Fastener Length: 6.252 INCHES MINIMUM AND 6.282 INCHES MAXIMUM IN; Extended Washer Diameter: 0.818 INCHES MINIMUM AND 0.828 INCHES MAXIMUM IN. 20 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.