... ,Brass Bolts.1.What’s the specification of our Products ? MaterialsCarbon steel,Stainless steel,Alloy steel,Copper,Aluminum are available.Carton steel ... ,Hexavalent chromium are accord with ROHS Standard.Weight Quantity of each plastic bag will be packing as per the Fasteners' size ... fastener.Perfect quality 1.In Carbon Steel,The material are always use C1022 ,The percent of C element is 0.18%-0.23 ...