Cheese Head Self Tapping Screw with Hexagon Socket 1)Material:A2,A4 2)Size:ST2.2~ST9.5 3)L:9.5~70 4)Finish:passivated Cheese Head Self Tapping Screw with Hexagon Socket This screw is our new product, which is developed by our Research and Development Department(R&D). If you are interested in it, please do not hesitate to contact with us. Our Company Information: