The version is 2.20. This is a database that provides instant access to detailed dimensional information for 1100+ screw threads from the following types: UNC, UNF, UNEF, UNJ, UNJC, UNJF, UNJEF, UN, UNS, BUTTRESS, UNM, STI, ACME, STUB ACME, NPT, NPTF, NPSM, NPSL, ISO, BSW, BSF, and BA. It offers an...