Hex Head Cap Screws are designed for easy assembly into a tapped hole. Hex Cap Screws meet SAE specifications with a specially designed washer face under the head and a chamfered point. Brass is basically 2/3 copper and 1/3 zinc. It is nonmagnetic with high electrical conductivity. It has good corrosion resistance. Brass is commonly used by electrical and communications industries, builders hardware and some marine applications.