The Bolt,shear, cataloged under National Stock Number 5306-00-281-7172, 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 19 specifications, cited from the U.S. Government catalog. The record lists 7 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-00-281-7172 |
| Primary Part Number | MB84-5D21 |
| Item Name | Bolt,shear |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Hi-Shear Corporation |
| 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 | 1.838 INCHES MINIMUM AND 1.888 INCHES MAXIMUM IN |
| Extended Washer Diameter | 0.521 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN |
| Thread Length | 0.516 INCHES MINIMUM AND 0.586 INCHES MAXIMUM IN |
| Shank Unthreaded Hole Diameter | 0.076 INCHES MINIMUM AND 0.081 INCHES MAXIMUM FIRST HOLE IN |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | DOUBLE HEXAGON W/HOLE |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.302 INCHES MINIMUM AND 1.322 INCHES MAXIMUM IN |
| 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) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 1.630 INCHES MINIMUM AND 1.690 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 |
|---|---|
| S11-1059-5D21 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| 74328-5D21 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| GS1030-5D21 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| ST3M571-5D21 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| AIC752-5D21 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| VAL23033-5D21 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| MB84-5D21 PRIMARY | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| BM3326-5D21 | 5/9 Secondary reference U.S. Government activity |
| S371-5D21 | 5/9 Secondary reference U.S. Government activity |
| ST3M571-5D21 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| VS3060-5D21 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-00-281-7172 is a Bolt,shear, manufactured by Hi-Shear Corporation, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-281-7172 has 7 manufacturer part numbers on file: S11-1059-5D21 (Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries), 74328-5D21 (Sps Technologies, Llc Dba PB Fasteners), GS1030-5D21 (B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace), ST3M571-5D21 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), AIC752-5D21 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company) and 2 more.
Key specifications for MB84-5D21: 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: 1.838 INCHES MINIMUM AND 1.888 INCHES MAXIMUM IN; Extended Washer Diameter: 0.521 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN. 19 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.