WIKA PART# ZT5421.00 TW15-M-A-I-ND-UD-01625-01750-G3-A-0 625-0500-ZZ-ZZ Threaded Thermowell TW15, solid machined Specifications according to data sheet: TW 95.15 Head Design: Round with hexagon Thermowell Style: Tapered Unit of Measure: Imperial (inch) Process thread [P or E]: 1/2" NPT Instrument connection [N]: 1/2 NPT female Insertion length [U]: 1.625 inch Head Length: 1.75" Bar Material: Stainless steel 316/316L Bore size [B or d1]: 0.260 inch (6.6 mm) Root diameter [Q]: 0.625 inch Tip diameter [V or F3]: 0.500 inch Bore depth / stem length (US): 3.125 inch Tip thickness [Tt]: 0.250 inch (6.4 mm) Your Item number ZT5421.00