The Bolt,shear, cataloged under National Stock Number 5306-01-334-4207, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 24 specifications, cited from the U.S. Government catalog. The record lists 6 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-334-4207 |
| Primary Part Number | ST3M731-4H14 |
| Item Name | Bolt,shear |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES GRIP |
| Surface Finish | 63.0 MICROINCHES BEARING SURFACE OF HEAD |
| Surface Finish | 63.0 MICROINCHES THREADS |
| Head Height | 0.125 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN |
| Fastener Length | 1.285 INCHES MINIMUM AND 1.315 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-C-83488,TY2 CL3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.425 INCHES NOMINAL IN |
| Hole Configuration Style | HEXAGON CORNERS |
| Material Document and Classification | AMS 4967 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.865 INCHES MINIMUM AND 0.885 INCHES MAXIMUM IN |
| Width Between Flats | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM IN |
| Grip Diameter | 0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| Surface Treatment | ALUMINUM OVERALL |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | TITANIUM ALLOY UNS R56400 OVERALL |
| Hole Quantity | 3 |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Hole Type | DRILLED |
| Hole Diameter | 0.046 INCHES MINIMUM AND 0.056 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 |
|---|---|
| ST3M731-4H14 | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| SC2663-4-14H | Howmet Global Fastening Systems Inc (USA) |
| MB251-4H14 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| PBF1264-4H14 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| ST3M731-4H14 PRIMARY | The Boeing Company Div Defense (USA) |
| MB251-4H14 | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| ST3M731-4H14 | 5/9 Secondary reference Sps Technologies Inc |
| 801651-4H14 | 5/9 Secondary reference Sps Technologies Inc |
| 111364-4H14 | 5/2 Secondary reference U.S. Government activity |
| VS3207-4-14H | 5/9 Secondary reference U.S. Government activity |
| PBF1264H-14 | 5/9 Secondary reference Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
NSN 5306-01-334-4207 is a Bolt,shear, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-334-4207 has 6 manufacturer part numbers on file: ST3M731-4H14 (Sps Technologies Ltd, Tj Brooks Division), SC2663-4-14H (Howmet Global Fastening Systems Inc), MB251-4H14 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), PBF1264-4H14 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), ST3M731-4H14 (The Boeing Company Div Defense) and 1 more.
Key specifications for ST3M731-4H14: Surface Finish: 63.0 MICROINCHES GRIP; Surface Finish: 63.0 MICROINCHES BEARING SURFACE OF HEAD; Surface Finish: 63.0 MICROINCHES THREADS; Head Height: 0.125 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN. 24 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.