Pilot hole sizes

[Oddagus]

This site is really loaded with information. I am always amazed at how hard it is to insert a stainless screw into these marine aluminum boats. The one thing that helps is the use of the correct pilot bit size. This may have been posted before, but it may help someone out. Use this chart and a good bit to make life easier.

Screw Size Pilot Hole Drill Size
#4 3/32"
#6 7/64"
#8 1/8"
#10 9/64"
#12 5/32"
#14(¼") 3/16"
5/16" 1/4"

 

[dyeguy1212]

Good post!