Check the listing for details. MP Pumps 170 31119/01 Adaptor Casting M3. Condition: Used. Listed at 47.50 USD. The MP Pumps 170 31119/01 Adaptor Casting M3 is a high-quality pump accessory designed for use in various industrial and hydraulic systems. Made by the reputable brand MP Pumps, this adaptor casting is specifically designed to fit M3 threaded connections, ensuring a secure and reliable fit. Its durable construction and precise design make it a valuable component for maintaining and repairing pumps in a range of applications.