Replacement Mercury and Mercruiser prop nut. Doesn't include 816629Q tab washer. Suits various sterndrive models from MC1, Alpha 1, Gen 2, Bravo 1 and 2. Also suitable for a range of Mercury outboards in a wide range of HP.
Replaces - 18-3700
3/4" - 20 Thread
11/16 Spanner size
Aftermarket Mercruiser 11-52707Q1 Propeller Nut
