... screws, self tapping screws, set screws, hex socket head cap screws, woodscrews, self drilling screwsStandard: ANSI, ISO, DIN, BS, JIS, AS Material: Carbon steel, stainless steel ... , UIC, Russian or drawings from customers.Materail: Carbon steel or stainless steel, Q195, Q235, 35#, 45#, 35CrMo, 42CrMo, 40Cr etc.Protection ... you any problems plz contact me,welcome to inquiry.: Slotted pan head screws