Mack coach screw M6 x 40 mm, zinc-plated, 30 pieces. Coach screw with hexagon head and matching nut; intended for fixings indoors and outdoors. The pack contains 30 pieces. Material: zinc-plated steel. NOTE: check the exact length (40 mm) and whether M6 thread is suitable for your application. Check whether fixing materials or any washers are included in the specification list. Use suitable corrosion protection for applications in very aggressive environments.