Part Number 6740-4604 having (CAGE Code 06659) and FSC 4820 Valves Nonpowered in stock with ready to ship. Get an instant quote for 6740-4604 Valve Safety Relief by Testek 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.