Pinion nut size

[pjm8047]

What size pinion nut goes on a fine spline 8 3/4 489 pinion?

 

[Daves69]

FWIW, You do know these are locknuts with specific torque ranges pressed in them.
These at Ratech appear to be hex center locks......
1500 (ratechmfg.com)

This from Dr. Diff shows an automation top lock.........
Pinion Nut & Washer (doctordiff.com)

 

[Fran Blacker]

That drdiff nut is a one time use nut, I believe.

 

[pjm8047]

Will this yukon nut work? Just bought it at autozone.