On 9/16/2019 7:18 AM, Engr wrote: Is there any standard for Thread Laps
in Self Tapping Screws


Thread "laps"?

If you mean pitch. No not really. Those for sheet metal tend to have
large modestly course pitch threads. Others can be different. Trailer
deck screws or others intended to mount to structural steel often have
thread that looks more like a fine pitch machine thread. Drywall screws
for use with metal studs have a fine pitch because it has to hold in one
layer of sheet metal as opposed to pulling two pieces of sheet metal
together