... metric thread, tapping thread, drilling thread, half thread, full thread etc.2.Head type: Hexagon head, Mushroom head, ... Test, Durometer, and Coating Thickness Tester.WorkforceA group of experienced production technician, sophisticated engineer and dedicated QC.About usOur ... company was founded in October, 2000, specializing in the production of CNC/AUTO lathe, springs, shafts, screws, stamping parts ...