Answered: modification and types of screws

[Karthik]

@stuffstuff

Could we use a screw that was originally more than 2", but was cut down so that it was 2"?

No, this is not legal. You are using a screw that’s longer than 2".

@stuffstuff

What if the screw had a 2" unthreaded portion, would it still be legal after it was cut?

No, this is not legal. The screw must start at 2" or shorter, before you begin your modifications.

@stuffstuff

Do shoulder screws still count as screws? Would it be legal to modify that shoulder screw to have a smaller diameter?

Yes, shoulder screws still count as screws, and, yes this modification is legal.