- 5/8"-18 Shaft Threads. Fits on Sea Star helms typically found with Yamaha engines. Fits on Edson tapered shafts (produced starting in 2000)
- 12mm Shaft Threads. Fits on Uflex helms typically found with Mercury engines.
- 3/4"-10 Shaft Threads. Fits Edson Pedestal Shafts built prior to 1979
- 1/2"-20 Shaft Threads.
- 5/8"-11 Shaft Threads.
If you don't see your thread size listed here please call 508 995 9711 or email info@edsonintl.com