Material : Free Cutting Brass – CuZn39Pb3, IS 319, BS 249, or High-Grade free Cutting Brass, Copper, Aluminum Any special material As per customers’s/Company’s requirements. Thread : ISO Standard metric mm threads, British Standard Whitworth form, American standard, Din Standard Etc. As per customer’s/Company’s requirements Surface Treatment : Natural Nickel Plated Tin Plated Chrome Plated Silver Plated Any other treatment as per customer’s/Company’s requirements With assembled screws are available with optional material like a Brass screw, Stainless Steel(SS screw), Mild Steel(MS screw) Etc. And Screws are also available with different types of coatings and treatments. All Sizes can be developed exclusively as per Custom design and specification.