Ferguson TO30 Nut

[OldFart187]

Need a nut to set the tapered roller bearing free play/preload on my Ferguson TO30 steering column. I have an order for other items ready to go at McMaster and would prefer to add it to that order rather than pay another $10-15 for shipping elsewhere. The photos show the diameter measures 0.7865, almost exactly 20mm. The other photo shows 14 threads in 0.48", about 29tpi, or 1.15mm. Could this be a M20-1.0 thread?

 

[Ray,IN]

My TO 30 did not have any metric threads, it was Whitworth best I recall.

 

[OldFart187]

Thanks. I checked Whitworth threads but there's nothing close to the 0.787 measured (20mm) diameter.

 

[Ray,IN]

Your caliper shows the shaft diameter, but not thread OD.

 

[Jim.ME]

A look at the TO30 parts book shows 13/16"-28TPI nuts were used. This might not be exactly like yours but 13/16- 28 looks like it might be the answer. Do you have a thread pitch gauge to correctly check the thread pitch? I have seen many counted wrong when trying to count number to length, without a gauge.