3-Piece Mercury 8M0042201 Castle Washer Adaptor with Flo Torq II Delrin Propeller Hub 835257K1 and Prop Lock Washer. Fits Mercury and Yamaha Standard 1" Shafts. Flo Torq Hub KitSKU: HK-77 $39.95 Regular Price$15.00Sale PriceQuantityAdd to CartBuy Now