... Metal coupling, class T coupling, Sub OD coupling, with various spec. of Full size, Slim Hole, grand ... chamfer, Two-way camber,etc. With world top level equipments and technicians, the monthly ... by Extrusion Tap 5. Phosphating on surface, end face and inner threads.7/8"SPRAY METAL FULL SIZE ... /8" SPRAY METAL COUPLING WITH BIG CHAMFER, SIZES ARE API 11B STANDARD 7/8" SPRAY METAL SUCKER ...