... +Co 4.Application:Fastening nylock patch lock screw Products Details:Products Namelock screw SizeM0.8~M4 Material Carbon steel Finish ... Short lead time lock screw8. Be used in high end industries like hard disk,camera,electronics,etcall kinds of screwCompany ... such as hard disk screw, self tapping screw, patch screw, water-proof sealing screw, head colored screw, special use screw as well as precision ...