The Bolt,shear, cataloged under National Stock Number 5306-00-285-9178, 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 15 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-285-9178 |
| Primary Part Number | MB84-5D43 |
| Item Name | Bolt,shear |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Head Height | 0.338 INCHES MINIMUM AND 0.358 INCHES MAXIMUM IN |
| Fastener Length | 3.224 INCHES MINIMUM AND 3.254 INCHES MAXIMUM IN |
| 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 |
| Shank Unthreaded Hole Diameter | 3.143 INCHES MINIMUM AND 3.178 INCHES MAXIMUM FIRST HOLE IN |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | DOUBLE HEXAGON W/HOLE |
| Width Between Flats | 0.367 INCHES MINIMUM AND 0.376 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 CORROSION RESISTING 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 |
|---|---|
| ST3M571-5D43 | The Boeing Company Div Defense (USA) |
| 74328-5D43 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| ST3M571-5D43 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| AIC752-5D43 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| VS3060-5D43 | Howmet Global Fastening Systems Inc (USA) |
| S11-1059-5D43 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| GS1030-5D43 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| S371-5D43 | Huck International, Inc (USA) |
| ST3M571-5D43 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| MB84-5D43 PRIMARY | Hi-Shear Corporation (USA) |
| VAL23033-5D43 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| ST3M571-5D43 | Heartland Precision Fasteners Inc (USA) |
| BM3326-5D43 | Huck International, Inc (USA) |
| Reference | Meaning |
|---|---|
| VS3060-5D43 | 5/9 Secondary reference U.S. Government activity |
| ST3M571-5D43 | 5/9 Secondary reference Graybar Electric Company, Inc. |
| S371-5D43 | 5/9 Secondary reference U.S. Government activity |
| BM3326-5D43 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-00-285-9178 is a Bolt,shear, manufactured by Hi-Shear Corporation, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-285-9178 has 13 manufacturer part numbers on file: ST3M571-5D43 (The Boeing Company Div Defense), 74328-5D43 (Sps Technologies, Llc Dba PB Fasteners), ST3M571-5D43 (Fastener Innovation Technology, Inc. Dba F I T), AIC752-5D43 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), VS3060-5D43 (Howmet Global Fastening Systems Inc) and 8 more.
Key specifications for MB84-5D43: Head Height: 0.338 INCHES MINIMUM AND 0.358 INCHES MAXIMUM IN; Fastener Length: 3.224 INCHES MINIMUM AND 3.254 INCHES MAXIMUM IN; 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. 15 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.