Prop bolts are standard AN, often installed with nylock nuts. If you use a
wooden prop, don't buy the bolts 'til you have the prop in hand and can measure
the right length (add a washer under any bolt crushing wood) and use your prop
supplier's installation directions.( I used Sterba) A. Spruce over-charges for
"prop bolts". For pushers, there is a correct blade orientation, Tractors are
your choice, except if you hand-prop, mount it so it pulls horizontal on the
compression stroke. Is that helpful? Peter
