Designation Description Page External (ASME/ANSI B1.5-1988 CLASS 3G) 1226 Acme Internal (ASME/ANSI B1.5-1988 CLASS 3G) 1227 Acme External, left hand, full profile (S-8879C 9-1992 1228 UNJ CLASS 3A) External, right hand, full profile (S-8879C 9-1992 1229 UNJ CLASS 3A) Internal, right hand, full profile (S-8879C 9-1992 1230 UNJ CLASS 3A) External & internal (DIN 103 04/1977 CLASS 7H 1231 Trapeze DIN 103 (EXTERNAL) CLASS 7E (INTERNAL)) External & internal (DIN 103 04/1977 CLASS 7H 1232 Trapeze DIN 103 (U-type) (EXTERNAL) CLASS 7E (INTERNAL)) External & internal (DIN 513 04-1985) 1233 Sage DIN 513 External & internal (DIN 513 04-1985) 1234 Sage DIN 513 (U-type) External & internal (ANSI B1.9-1973 CLASS 2) 1235 American Buttress External & internal (ANSI B1.9-1973 CLASS 2) 1236 American Buttress (U-type) External & internal, API round type (API spec 1237 API - Oil Threads 5B8-1996) 1181