The Bolt,shear, cataloged under National Stock Number 5306-01-195-7936, 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-195-7936 |
| Primary Part Number | MB156-3-21 |
| Item Name | Bolt,shear |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Extended Washer Thickness | 0.017 INCHES MINIMUM AND 0.037 INCHES MAXIMUM IN |
| Head Height | 0.158 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN |
| Fastener Length | 1.696 INCHES MINIMUM AND 1.726 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Extended Washer Diameter | 0.349 INCHES MINIMUM AND 0.359 INCHES MAXIMUM IN |
| Thread Length | 0.374 INCHES MINIMUM AND 0.424 INCHES MAXIMUM IN |
| Material Document and Classification | AMS5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | SPLINE EXTENDED WASHER |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.302 INCHES MINIMUM AND 1.322 INCHES MAXIMUM IN |
| Head Minor Diameter | 0.253 INCHES MINIMUM AND 0.259 INCHES MAXIMUM IN |
| Grip Diameter | 0.1890 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 220000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| 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 |
|---|---|
| MB156-3-21 PRIMARY | Hi-Shear Corporation (USA) |
| VFK600-3-21 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| 11829-3-21 | Reid Products Inc. Dba Reid Products Inc (USA) |
| ST3M753-3-21 PRIMARY | The Boeing Company Div Defense (USA) |
| AIC763-3-21 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| PBF1267-3-21 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| MB156-3-21 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| Reference | Meaning |
|---|---|
| S343-3-21 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| 122897-3-21 | 3/2 Design control — primary reference U.S. Government activity |
| VS3190-3-21 | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
| S343-3-21 | 5/9 Secondary reference U.S. Government activity |
| 122897-3-21 | C/1 Advisory reference — outside the item-of-supply concept Sps Technologies, Llc Dba PB Fasteners |
| VS3190-3-21 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-195-7936 is a Bolt,shear, manufactured by Hi-Shear Corporation, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-195-7936 has 7 manufacturer part numbers on file: MB156-3-21 (Hi-Shear Corporation), VFK600-3-21 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), 11829-3-21 (Reid Products Inc. Dba Reid Products Inc), ST3M753-3-21 (The Boeing Company Div Defense), AIC763-3-21 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company) and 2 more.
Key specifications for MB156-3-21: Extended Washer Thickness: 0.017 INCHES MINIMUM AND 0.037 INCHES MAXIMUM IN; Head Height: 0.158 INCHES MINIMUM AND 0.198 INCHES MAXIMUM IN; Fastener Length: 1.696 INCHES MINIMUM AND 1.726 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 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.