Part Number NAS1791C4-1 Nut Self Locking Plate Two Lug in stock with ready to ship. Get an instant quote for Rolls Royce Allison part number NAS1791C4-1 by filling form below with your desired order quantity, targeted price and the expected order-fulfilment date. Get instant quote for NAS1791C4-1. Our dedicated account manager will get back to you within 15 minutes.