T-Handle knobs manufactured by Carr Lane are designed to provide maximum leverage for a high-clamping force. These machinery knobs are available in textured non-slip thermoplastic and Phenolic plastic with a hard, smooth & shiny finish. Both types of T handle knobs feature a molded-in brass insert, providing superior thread strength. These American-made machinery knobs sold through the Carr Lane catalog are available with tapped-hole sizes from 1/4-20 to 3/8-16 (M6 to M10 metric). Thermoplastic T handle knobs are available in three different knob sizes (1-1/16”, 2” and 2-1/2”) while phenolic plastic T-handle knobs are a standard 2-1/2”. Special orders on these machinery knobs are available in order quantities greater than 500. Browse all our T handle knobs below.