Boat owners, listen up! If you need a replacement prop nut for your Yamaha outboard, this is the one you want. Made from solid brass construction that can handle the tough marine environment without corroding. It directly replaces Yamaha OEM parts 90171-16011-00 and 95307-16900, plus it's interchangeable with Mallory 9-73908. Sierra makes quality marine parts that meet or exceed the original equipment standards, so you know you're getting something reliable. Super easy to install - just one prop nut per package. Perfect for when you're doing maintenance or repairs on your Yamaha outboard motor. Don't risk your propeller with subpar parts - this brass nut will keep everything secure while you're out on the water. Whether you're a weekend fisherman or serious boater, having the right replacement parts makes all the difference. This is one of those small but crucial components that keeps your motor running smoothly season after season.