Flat washers are perfect for increasing the bearing surface under the head of fasteners by distributing the load through the washers and can ensure safe holding; They can prevent bolts or nuts from pulling through the surface. 304 stainless steel is a common austenitic stainless steel, typically non-magnetic or weakly magnetic. However, under certain special circumstances, due to the transformation of the austenitic structure into a martensitic structure during cold working, and since the martensitic structure is ferromagnetic, this can cause 304 stainless steel to exhibit slight magnetism.