... steel, carbon steel, aluminum etc Threads: BSP, cnc machining1. Material: brass, copper, bronze, alloy steel, stainless steel, carbon steel, aluminum etc2 ... parts, casting and forging parts, welding parts, assembly service.4. ISO9001 2000 quality control5. Strong engineering team makes high quality; own test ... highly appreciated and given the best attention. cnc machining ISO9001 2000 quality control