... : bronze CuSn12 3. OEM welcome 4. ISO9001:2008 certified 1. Precision screw bronze part from CNC turning;2. Material: bronze CuSn12 ... Machining, Precision Machining, Turning, Milling, Drilling, Tapping...Soft Metals:Aluminum, Brass, Carbon Steel, Copper, Stainless Steel 316, 303, 304...Plastics:Nylon, POM ... Time:10 days for sample; 30 days for mass production. Precision small screw bronze