Image may not reflect selected features Parker PGI Thermowell, 3/4in NPT x 1/2in NPT X 2U SKU: 21A030T21A00AEC 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, 2” U-Length. Details 304 Stainless Steel. 0.260 Internal Bore 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, 2” U-Length. Back 304 Stainless Steel. 0.260 Internal Bore with threaded mounting style. 0.0 Lag Length, 0.500 Tip Diameter, 0.500 Root Diameter.