PKS90B101/4 is a molded phenolic control knob featuring a straight knurl design with a spun aluminum skirt and 0-10 numeral markings. The knob has an overall diameter (A) of 1.42 inches (36.1 mm) and a height (B) of 0.917 inches (23.3 mm), with a skirt diameter (C) of 0.780 inches (19.8 mm). It is designed for 1/4" shafts and includes a No. 6-32 set screw for secure mounting. This knob is ideal for potentiometer and rotary switch applications where precise position indication with numbered markings is required.