'Three Prong Knob, Thread Size (In.) 8-32, Dia. (In.) 7/8 In., Tap Type (In.) Blind, Base Dia. (In.) 1/2, Knob Type Clamp Knob, Style Three Arm, Material GP Phenolic, Finish High Gloss, Standards H. H. Brass, Height (In.) 0.75, Length (In.) 0.75 In., Overall Height 0.75, Overall Length 0.75 In., Thread Type Course, Type 0.37 In., Width -30 to 400 F'