Raogoodcx 50 Sets M6 Square Hole Hardware Cage Nuts & Mounting Screws Washers for Server Rack and Cabinet (M6 X 20mm)(screw+washer+cage nut) High quality cabinet cage nuts and screws Package includes: cage nuts x 50pcs, screws x 50pcs, Washers x 50pcs Material: Metal, Zinc-plated Size: M6 x 20 Fit all square hole racks server rack or cabinet