Part Number 7931-A5638-1 Bracket Mounting Brush Block in stock with ready to ship. Get an instant quote for Hartzell Propeller part number 7931-A5638-1 by filling form below with your desired order quantity, targeted price and the expected order-fulfilment date. Get instant quote for 7931-A5638-1. Our dedicated account manager will get back to you within 15 minutes.