... and best services to our clients. Our main products are: bolts, screws, nuts, machine screws, plain washers, spring lock washe rs ... and many other hardware products made of carbon steel, alloy & stainless steel, aluminum, brass or other special materials. For finishing, we ... , 6.8, 8.8, 10.9, 12.9, A2-50, A2-70, and A4-70. We are now seeking strategic business partners worldwide to ...