Image may not reflect selected features Parker PGI Thermowell, 3/4in NPT X 1/2in NPT X 3U SKU: 21D030T22A00ACC Please Login to See Price Quantity discounts available QuantityPrice Quantity -+ Description Texas Thermowell 21 Series, 3/4" NPT Process Connection, 1/2" NPT Instrument Connection, 3” U-Length. Details 316 Stainless Steel, 0.260 Internal Bore and Stepped Shank with threaded mounting style. 0.0 Lag Length, 0.500 Tip Diameter, 0.500 Root Diameter. DescriptionDetails Back Texas Thermowell 21 Series, 3/4" NPT Process Connection, 1/2" NPT Instrument Connection, 3” U-Length. Back 316 Stainless Steel, 0.260 Internal Bore and Stepped Shank with threaded mounting style. 0.0 Lag Length, 0.500 Tip Diameter, 0.500 Root Diameter.