Prop Nut Assemblies
To avoid the problem of long screws which tend to flex and break where they enter the adapter nut, Dave Brown Products make four length adapter nuts: short, long, extra long. Using these prop adapter nuts allows for the use of small screws, thus avoiding potential problems.
  • Use short adapters with spinners 2 1/2 in. and smaller.
  • Use long adapters with spinners 2 3/4 in. and 3 in.
  • Use extra long adapters with spinners 3 1/4 in. and larger.
Although it will depend on the thickness of the prop hub, it's always best to use the longest prop adapter nut possible.

For more information and option to buy link to:
www.sigmfg.com