The Bolt,shear, cataloged under National Stock Number 5306-01-514-0955, 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 16 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-01-514-0955 |
| Primary Part Number | MB156-5-33 |
| Item Name | Bolt,shear |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| Extended Washer Thickness | 0.035 INCHES MINIMUM AND 0.055 INCHES MAXIMUM IN |
| Head Height | 0.312 INCHES NOMINAL IN |
| Fastener Length | 2.496 INCHES MINIMUM AND 2.628 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Extended Washer Diameter | 0.575 INCHES MINIMUM AND 0.585 INCHES MAXIMUM IN |
| Thread Length | 0.551 INCHES NOMINAL IN |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.3125 INCHES IN |
| Head Style | SPLINE EXTENDED WASHER |
| Thread Direction | RIGHT-HAND |
| Grip Length | 2.062 INCHES NOMINAL IN |
| Head Minor Diameter | 0.360 INCHES MINIMUM AND 0.375 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 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 |
|---|---|
| MB156-5-33 PRIMARY | Hi-Shear Corporation (USA) |
| ST3M753-5-33 | Houston Precision Fasteners I Lp (USA) |
| HP7753-5-33 PRIMARY | Heartland Precision Fasteners Inc (USA) |
| SLB255-5-33 | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| S343-5-33 PRIMARY | Huck International, Inc (USA) |
| ST3M753-5-33 PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| 122897-5-33 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| VS3190-5-33 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| VFK600-5-33 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| PBF1267-5-33 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| 11829-5-33 | Reid Products Inc. Dba Reid Products Inc (USA) |
| ST3M753-5-33 PRIMARY | The Boeing Company Div Defense (USA) |
| AIC763-5-33 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| GS1032-5-33 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| ST3M753-5-33 | Saturn Fasteners Inc (USA) |
| MB165-5-33 | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| 122897-5-33 | 3/2 Design control — primary reference U.S. Government activity |
| AIC783-5-33 | 5/9 Secondary reference Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company |
| MB156-5-33 | 5/9 Secondary reference Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc |
| 122897-5-33 | 5/9 Secondary reference Sps Technologies Inc |
NSN 5306-01-514-0955 is a Bolt,shear, manufactured by Hi-Shear Corporation, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-514-0955 has 16 manufacturer part numbers on file: MB156-5-33 (Hi-Shear Corporation), ST3M753-5-33 (Houston Precision Fasteners I Lp), HP7753-5-33 (Heartland Precision Fasteners Inc), SLB255-5-33 (Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok), S343-5-33 (Huck International, Inc) and 11 more.
Key specifications for MB156-5-33: Extended Washer Thickness: 0.035 INCHES MINIMUM AND 0.055 INCHES MAXIMUM IN; Head Height: 0.312 INCHES NOMINAL IN; Fastener Length: 2.496 INCHES MINIMUM AND 2.628 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.