... Screw Finsh:Cu-Ni-Sn+Co 4.Application:Fastening nylock patch lock screw Products Details:Products Namelock screw SizeM0.8~M4 ... productlock screw ,hard disk screws,self tapping screw,nylock/nylon patch screw,waterproof sealing screws,color head screw and precision shaft ... precision screws, such as hard disk screw, self tapping screw, patch screw, water-proof sealing screw, head colored screw, special use ...