... CMM 5. Ra1.0, Polish Ra0.4 Piston casting used for industrial clutch and brakes.1. Material: ASTM C-1362 ... ;2. Sand casting, smooth surface;3. Machined ... , Railway fittings, ring flange , electromagnetic steel cover, piston, pressure plate, center plate, wear plate, cylinder, ... A356, A360, A380, ADC12 etc. Piston Casting for industrial clutch