'Three Prong Knob, Thread Size (In.) 10-32, Dia. (In.) 1-1/8 In., Tap Type (In.) Thru, Base Dia. (In.) 1/2, Knob Type Clamp Knob, Style Three Arm, Material GP Phenolic, Finish High Gloss, Standards H. H. Brass, Includes Pad Print, Height (In.) 0.75, Length (In.) 0.77 In., Overall Height 0.75, Overall Length 0.77 In., Thread Type Fine, Type 0.38 In., Width -30 to 400 F'