... nickle plating round base plate with slots and holes for heavy machineryproduct namedimension(mm)materialfinish and weight(kg)base plateOD250 ... 4*M20*90º d12H12S355JR nickle plating ,7.6kgbase plate for heavy machinery can be used in petroleum ,water, gas ... parts, valves ,shafts ,cylinders,inserts,lifting and cargo-handling appliances, and machinery parts for the usages on textile ,passenger elevator ...