Motor Pump shaft extension castings / OEM Specification OEM service for Valve shafts and Valve Stems. Valve shafts with flange per customer's design. Material: CF8, CF8M, CF3, CF3M, 304, 316, 316L Material List CF8M/CF8 CF3M CA15 ALLOY 20 HASTELLOY C STELLITE 6 DUPLEX MONEL CK3MCuN CW12MW CX2MW CD3MN 410 CE3MN Special material is available at request.