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Subs or Adoptors are used as connectors or coupling to connect drill rods, core barrels, casing, rock bits, water swivel, hoisting plug, fishing tools etc. that have different size or type of threads.
All female ends are called "Box" and male ends are called "Pin". All subs are manufactured with right hand thread connections unless the purchaser specifies left hand.
UEW manufacture all type subs or adoptor as per customer requirements / drawings.
