NT6142 Nuffield Belt Pulley Tab Washer. Secures the nut that holds on the main drive gear.
See part numbered 6 in the illustration.
Fitted to tractors:
- Nuffield Universals M3, M4, MV3, PM4, DM4
- Nuffield Universal Three (3DL), Nuffield Universal Four (4DM)
- Nuffield 342, 460