These are perfect for screwing wood to steel surfaces. We've used these to refloor trailer flooring / box truck flooring.

They are coated with a "Climaseal" coating to resist rusting / corrosion / impacts / etc....

They have cutting wings to prevent thread engagement while drilling and self-tap into the steel beneath the wood.

Online these sell for about .40c each....$64 for 160 screws.....

Buy it here for half price......20c each.....$32 for 3 pounds (approx. 160 screws) !!

Thanks for looking !