The Bolt,shear, cataloged under National Stock Number 5306-00-026-2125, 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 15 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-026-2125 |
| Primary Part Number | ST3M561-6-18 |
| Item Name | Bolt,shear |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Head Height | 0.200 INCHES MINIMUM AND 0.220 INCHES MAXIMUM IN |
| Fastener Length | 1.509 INCHES MINIMUM AND 1.556 INCHES MAXIMUM IN |
| Thread Length | 0.374 INCHES MINIMUM AND 0.441 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | DOUBLE HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.115 INCHES MINIMUM AND 1.135 INCHES MAXIMUM IN |
| Width Between Flats | 0.553 INCHES MINIMUM AND 0.564 INCHES MAXIMUM IN |
| Grip Diameter | 0.3735 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Minimum Tensile Strength | 220000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL 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 |
|---|---|
| MB13-6-18 | Hi-Shear Corporation (USA) |
| A1C220-6-18 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| MB13-6-18 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| 73992-6-18 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| ST3M561-6-17 | Huck International, Inc (USA) |
| ST3M561-6-18 PRIMARY | The Boeing Company Div Defense (USA) |
| MB13-6-18 | Fairchild Fasteners Europe - Vsd Gmbh (DEU) |
| Reference | Meaning |
|---|---|
| 73992-6-18 | 5/9 Secondary reference Sps Technologies Inc |
| ST3M561-6-17 | 5/9 Secondary reference U.S. Government activity |
| ST3M561-6-17 | 5/9 Secondary reference U.S. Government activity |
| A1C244-6D18 | 5/9 Secondary reference Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company |
| ST3M561-6-17 | 5/9 Secondary reference Standard Pressed Steel Co Aircraft Products Div |
NSN 5306-00-026-2125 is a Bolt,shear, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-026-2125 has 7 manufacturer part numbers on file: MB13-6-18 (Hi-Shear Corporation), A1C220-6-18 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), MB13-6-18 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), 73992-6-18 (Sps Technologies, Llc Dba PB Fasteners), ST3M561-6-17 (Huck International, Inc) and 2 more.
Key specifications for ST3M561-6-18: Head Height: 0.200 INCHES MINIMUM AND 0.220 INCHES MAXIMUM IN; Fastener Length: 1.509 INCHES MINIMUM AND 1.556 INCHES MAXIMUM IN; Thread Length: 0.374 INCHES MINIMUM AND 0.441 INCHES MAXIMUM IN; Nominal Thread Diameter: 0.375 INCHES IN. 15 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.