Part Number 991-4-00670-020 Screw 6 32 Unc X 1 3 4 Long in stock with ready to ship. Get an instant quote for Eaton Aviation Corporation part number 991-4-00670-020 by filling form below with your desired order quantity, targeted price and the expected order-fulfilment date. Get instant quote for 991-4-00670-020. Our dedicated account manager will get back to you within 15 minutes.