Mercury - Sterndrive Installation Hardware Kit Alpha & Bravo Series Stainless Steel Fasteners 859116K01. Overview. Any boater who has spent time around sterndrives knows how important solid, reliable hardware is. When you're pulling the drive to service a bellows or reinstalling after maintenance, you want fasteners that feel tight, clean, and trustworthy. That's why this genuine Mercury Marine part stands out. The 859116K01 hardware kit gives you the reassurance that the bell housing on your Al