Our rack mounting screws are made of black galvanized carbon steel which has high strength Not easy to corrode good oxidation resistance and good color matching ensuring reliability and strength to meet your server installation needs This kit includes 120 M6*20mm/0.79 inch rack screws 120 Cage nuts 120 carbon steel black zinc washers 30 nylon washers and 1 CR-VPH2 universal drill bit facilitating the Settings required for seamless connection Our M6 rack cage screws and lock nuts conform to the standardized metric system The average error is less than 0.01mm The threads are very sharp clean accurate and burr-free Tight and evenly stressed threads are not prone to deformation and slippage during rolling and installation Deep and clear flat beams can make your job easier and increase your productivity These M6 Cage Screw Kits are universally compatible with square hole server racks routers and A/V etc equipment enclosures rack and cabinet mount We fix the carbon steel washer and n