... ISO,A,AG,G,W,UN,NPT,ACME,API carbide internal & external threading insert SIZE RANGES ARE 11ER/16ER/22ER11IR/16IR/22IR ... also can produce non-standard carbide threading inserts, CNC inserts and grooving inserts.The performance of our insert can be as good ... as Tungaloy and Mitsubishi.Our carbide inserts sold very well in ...