... name:thread bars standard:din975 surface:zinc plated , black , plain , H.G.D grade:4.8 , 8,8 Our main products are ... bolts, screws, nuts, machine screws, plain washers, spring lock washers, wood ... Dacromet. Our products are produced in conformity with DIN, ANSI, AS, BS, JIS, GB and ISO standards, non-standard specifications or ...