... separately to ensure optimized welding and mechanic performances.2 Tool joints are treated with specific heat treatment ... ThicknessEnd Upsets2 7/81 1/20.6882 15/16NC 26 (2 3/8 IF)3 3/81 1/ ... .263,8002 7/81 1/20.6882 15/16NC 26 (2 3/8 IF)3 3/81 1/ ... /4Spiral63.8730,0006 5/84 1/21.0636 15/166 5/8 FH84 1/2Standard71.4363,7006 ... 5/84 1/21.0636 15/166 5/8 FH84 1/2Spiral74.6263,700 ...