T Knob Screw Length (In.) 1.00 In. Thread Size (In.) 1/4-20 Dia (In.) 2-1/2 In. Base Dia (In.) 3/4 Knob Type Clamp Knob Style Bar Material GP Phenolic Finish High Gloss Standards Steel Zinc Plated Height (In.) 1.125 Length (In.) 2.13 In. Overall Height 1.125 Overall Length 2.13 In. Thread Type Course Width -30 to 400 F