WIKA TH2R025CC 304 Stainless Steel Threaded Thermowell Reduced Shank, 2.5" "U" Dimension, 1/2" NPT Process Connection for Bimetal and Gas Actuated Thermometers Process connection: Threaded Shank configuration: Reduced Bore diameter: 0.260" Surface finish: Brass: 60-100 Ra, AISI 304 and AISI 316: 60-100 Ra "U" Dimension: Length of well inserted into the piping system, measured from the base of the process connection to the end tip of well