Description Specifications Literature Description Ashcroft's thermowells are made of brass, carbon steel, 304 stainless steel and 316 stainless steel. The process connection is available in different sizes ranging from 0.5" to 2" and the bore sizes varies on which type of thermowell is selected; either .260, .385 or both. State of California Proposition 65 WARNINGCancer and Reproductive Harm - www.P65Warnings.ca.gov. Product Specifications Size:3/4 inU-Dimension:4 ½ inThread:1/2 NPSMLagging:WithoutShank:SteppedType:NPT Thd.Bore:.260"Material:AISI 316 Literature & Docs Product Specifications Technical Drawing Accessories