The Shaft,shouldered, cataloged under National Stock Number 3040-01-135-8744, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Martin-Baker Aircraft Company Limited. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-135-8744 |
| Primary Part Number | MBEU-69091 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Martin-Baker Aircraft Company Limited |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES |
| FSC Application Data | SEAT,AIRCRAFT EJECTION |
| Step Quantity | 4 |
| First End Diameter | 0.5570 INCHES MINIMUM AND 0.5600 INCHES MAXIMUM IN |
| First End Flat Depth | 0.2530 INCHES MINIMUM AND 0.2550 INCHES MAXIMUM IN |
| Second End Diameter | 0.4340 INCHES MINIMUM AND 0.4360 INCHES MAXIMUM IN |
| Second End Step Length | 0.562 INCHES NOMINAL IN |
| Largest Step Diameter | 0.557 INCHES MINIMUM AND 0.560 INCHES MAXIMUM IN |
| First End Style | FLATTED |
| End Similarity | NOT IDENTICAL |
| Second End Style | SQUARE (ROUND CORNERS) |
| First End Flat Length | 0.252 INCHES NOMINAL IN |
| Material | STEEL CORROSION RESISTING |
| Second End Width Across Flats | 0.309 INCHES MINIMUM AND 0.311 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| MBEU-69091 PRIMARY | Martin-Baker Aircraft Company Limited (GBR) |
NSN 3040-01-135-8744 is a Shaft,shouldered, manufactured by Martin-Baker Aircraft Company Limited, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-135-8744 has 1 manufacturer part number on file: MBEU-69091 (Martin-Baker Aircraft Company Limited).
Key specifications for MBEU-69091: Surface Finish: 32.0 MICROINCHES; FSC Application Data: SEAT,AIRCRAFT EJECTION; Step Quantity: 4; First End Diameter: 0.5570 INCHES MINIMUM AND 0.5600 INCHES MAXIMUM IN. 14 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.
NSN 3040-01-135-8744 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.