Carbon Steel, 1010# or 1018# or 1022#, black oxide, Pan Phillips Head Self-tapping Screw, DIN7981 Features1) Material: carbon steel, alloy steel, stainless steel, colored steel,copper 2) Grade: 8.8, 10.9, 12.9 3) Standards: DIN, ANSI, JIS, BS,GB, ISO,GB4) Finish: chrome plated, zinc plated nickel plated or black Pan Phillips Head Self-tapping Screw, DIN7981