... *20 Product name: machine screwRelated Products: wood screw, chipboard screw, ball screw, hex head screwbolt screw, bolts and nuts, self drilling screw, self tapping screw, machine screw, furniture screwdrywall screw, screw nut, screw ... CNC machine, automatic lathe, grinder, thread rolling machine, tapping /drilling machine etc 3) Measuring & testing equipment: Projecting profile, roughness tester, ...