NT6541B BRASS NUT.  Right hand thread brass nut use to reduce friction in the steering box on Nuffield tractors.

For more details view item 25 in this parts book drawing of the 
Nuffield tractor Steering Column.

This nut is also available in Steel, see part number NT6541 STEEL NUT.

Fitted to:

• Nuffield Universal Three (3DL), Universal Four (4DM)
• Nuffield 342 – 460, 10/42 – 10/60