Description
The Sierra 18-3708-1 Prop Nut & Keeper is a marine propeller hardware kit designed to secure the propeller onto the prop shaft. It includes a machined replacement propeller nut and its matching plastic locking keeper cap.
Compatibility
This hardware kit is interchangeable with several major marine manufacturer part numbers across outboard and stern drive configurations:
- Johnson/Evinrude Outboards: 398042, 5008966
- OMC Stern Drive: 3850984, 398042
- Volvo Penta: 3850984
- GLM: 22185
Product Specifications
- Thread Size: 1.25 inches
- Material/Finish: Machined or black anodized finish
- Components Included: 1 x Propeller Castle Nut, 1 x Locking Keeper Cap
