... main products are bolts, screws, nuts, machine screws, plain washers, spring lock washers, wood screws, tapping screws, drilling screws, chipboard screws, drywall screws, furniture screws, rivets, anchors ... specifications or upon our customers' special requirements, in grades 4.8, 6.8, 8.8, 10.9, 12.9, A2-50, A2-70, and A4-70.We are ... company, you are welcomed to visit us. HEX BOLTS ZINC PLATED