Part Number 991-4-00142-057 Screw 10 32 Unf X 5 8 Long in stock with ready to ship. Get an instant quote for Eaton Aviation Corporation part number 991-4-00142-057 by filling form below with your desired order quantity, targeted price and the expected order-fulfilment date. Get instant quote for 991-4-00142-057. Our dedicated account manager will get back to you within 15 minutes.