... Copper Alloy Nuts 2.Apply:machine parts 3.surface roughness:Ra0.8-Ra6.3 4.Tecnic:blanking 5.ISO9001 OEM Service Blanking Copper Alloy Nuts Copper ... Iron, Grey Iron, Ductile Iron,Carbon Steel, Stainless steel, Alloy steel, Aluminum, Aluminum alloy etc.StandardISO, GB, ASTM, DIN, JISEquipmentmelting furnace, centrifugal ...