Make sure your new steering wheel is a perfect fit! Hub adaptor secures to the underside of the steering wheel and fastens to the steering shaft. Installation hardware and instructions are included. For use with steering wheels that require a 5-Hole Hub Adaptor.  
Fits Mack models with a 1-1/8" shaft size 1950 and older.  
Fits Peterbilt COE 1972 and older.  
Fits Peterbilt CONV 1974 and older.