TT Electronics/BI Panel Mount Adapter 19mm, For Use With 89 Series Multi-Turn Trimmer Potentiometer, Shaft Diameter: 2.36 (Metal Adjustment Screw) mm, MPN: 89BLF-19MM.
TT Electronics/BI Panel Mount Adapter 32mm, For Use With 78 Series Multi-Turn Trimmer Potentiometer, Shaft Diameter: 2.79 (Metal Adjustment Screw) mm, MPN: 56BWSINGLEPKG.