Plain (Unthreaded) Shaft Length Tolerances for Adjustable Levers
  

  In adjustable levers with studs (GN 300, GN 300.1, WN 300, WN 300.1, GN 101, GN 101.1), there is a slight gap  between the bottom of the insert hub and the beginning of the threaded stud. The table lists the tolerance for  various thread sizes for these levers.