Propeller securing nuts come in a variety of different types, sizes and threads. Some common thread sizes are kept in stock others are manufactured in nickle aluminium bronze and some of the larger ones are cast in bronze then machined to customer requirements.
We stock a selection of plated nyloc nuts for securing the shaft inside the gearbox mating coupling. Any other sizes can normaly be sourced in 2 - 3 days. Special coupling nuts used where there is a lack of space for a hexagon nut are also manufactured in house.