1) Hexagon socket head cap screw, DIN912 is according to DIN standard;
2) Class 4.8, 8.8, for carbon steel; Stainless steel A2-70, A4-80 (304, 316), brass are available;
3) Size from M3 to M70, length from 20mm to 300mm;
4) Surface treatment including: Plain, zinc plated, nickel plated, H. D. G., black, dacromet, mechanical zinc plated;
5) Packing: Bulk packing 20kgs/carton, 36 cartons/palelt; Or small box packing under your requirements
6) Head mark: Our factory's head mark or your head marks