Iron Black Con. Constantan Yellow Cu. Copper Alloy N/A Ch. Chromel White Al. Alumel Green Dummy Brass N/A WIRE WELL DATA Contact Size Well Inside Dia. +.004 –.002 Well Depth +.031 –.000 Solder Well Barrel Outside Dia. 12 .125 .250 .166 ±.003 16 .094 .188 .125 –.004 ...