Part Number 0001-0028 ITEM 4 having (CAGE Code 86831) and FSC 5325 Fastening Devices in stock with ready to ship. Get an instant quote for 0001-0028 ITEM 4 Ring Retaining by Rockwell Collins 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.