... fastener field 1,Name: Black steel threaded rod ;Steel threaded rod;Black threaded rod2,For the similar threaded rod ,what can we do ?(1 ... ), Ability for the material of this kind of threaded rod: Grade3.6,4.6,4.8,5.6,6 ... .002mmCylindricity0.003mmRoughnessRa0.32Straightness0.01/200mm3,How about the packing details?Plastic bags inside,then carton(normally32cm*23cm*13cm),then fumigation free ...