Features: 1) Size: a) Hex nut: M2 to M135 b) Hex bolt: M6 to M48 2) Material: mild steel, 35C, 45C, SUS304, SUS316 . 3) Standards: DIN934 & ANSI B18.2.2 & JIS B1181, DIN931, DIN933 4) coating : zinc plated , hot dipped , epoxy coating , dacromet coating or at customers’ request . 4) special materials can be made upon customers’ request 5) special bolts and nuts can be made according to customers’ drawings or samples .