Part Number 520002 having (CAGE Code 77445) and FSC 5310 Nuts and Washers in stock with ready to ship. Get an instant quote for 520002 Nut Self Locking Extended Washer Double Hexagon by United Technologies. 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.