The Bolt,shear, cataloged under National Stock Number 5306-01-165-3284, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc. Government technical data includes 23 specifications, cited from the U.S. Government catalog. The record lists 9 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through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-165-3284 |
| Primary Part Number | MB84-6H21 |
| Item Name | Bolt,shear |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc |
| 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 | 1.911 INCHES MINIMUM AND 1.941 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 | 0.589 INCHES MINIMUM AND 0.639 INCHES MAXIMUM IN |
| Hole Configuration Style | DOUBLE HEXAGON LONGITUDINAL HOLE |
| Material Document and Classification | 23-112 FSCM 76301 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.375 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 | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM 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 |
| Hole Quantity | 4 |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Hole Type | DRILLED |
| Hole Diameter | 0.106 INCHES MINIMUM AND 0.111 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 |
|---|---|
| MB84-6H21 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| VAL23033-6H21 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| ST3M571-6H21 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| AIC752-6H21 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| ST3M571-6H21 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| ST3M571-6H21 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| MB84-6H21 PRIMARY | Hi-Shear Corporation (USA) |
| ST3M571-6H21 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| ST3M571-6H21 | Heartland Precision Fasteners Inc (USA) |
| Reference | Meaning |
|---|---|
| S371-6H21 | 5/9 Secondary reference U.S. Government activity |
| 74328-6H21 | 3/2 Design control — primary reference U.S. Government activity |
| 74328-6H21 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| VS3060-6H21 | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
| VS3060-6H21 | 5/9 Secondary reference U.S. Government activity |
| BM3326-6H21 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| BM3326-6H21 | 5/9 Secondary reference U.S. Government activity |
| S371-6H21 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| ST3M571-6H21 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
NSN 5306-01-165-3284 is a Bolt,shear, manufactured by Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-165-3284 has 9 manufacturer part numbers on file: MB84-6H21 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), VAL23033-6H21 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), ST3M571-6H21 (Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries), AIC752-6H21 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), ST3M571-6H21 (Sps Technologies, Llc Dba PB Fasteners) and 4 more.
Key specifications for MB84-6H21: 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: 1.911 INCHES MINIMUM AND 1.941 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 23 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.