Part Number 381MS131P002 having (CAGE Code 04164) and FSC 4820 Valves Nonpowered in stock with ready to ship. Get an instant quote for 381MS131P002 Valve Check by Raytheon Electronic Systems Inc. Fill the form below with your desired order quantity, targeted price and the expected order-fulfilment date. Our dedicated account manager will get back to you within 15 minutes.