Part Number 999-4-00174-006 Ring Retaining External in stock with ready to ship. Get an instant quote for Eaton Aerospace Llc part number 999-4-00174-006 by filling form below with your desired order quantity, targeted price and the expected order-fulfilment date. Get instant quote for 999-4-00174-006. Our dedicated account manager will get back to you within 15 minutes.