... Material: 1018 or 1022 carbon steel,SS302,SS304 and so on 3. Surface treatment: zinc plated, ... Material: 1018 or 1022 carbon steel,SS302,SS304 and so on3. Surface treatment: zinc plated, Cr3+Cr6 ... , slotted, hexagon, torx, square and so onAdvantage:1. Good hardness2. High and low temperature resistant3. Multicolor choose4. ... ’s need: America, Europe, Asia, and so on. SS Type 17 Chipboard Screw