Here is a pack of nylon cap screws that accept your normal hex driver. You get 25 screws. The thread length is 0.361"  These have many uses not the least of which is using them to mount your rear foam tires on your pan car to save weight over the aluminum cap screws. I admit I stole that idea from a Super High Level Team Driver and I can not release his name but if you look at the part number I gave him his props. Dirt Oval racers also love them for their side dams and other applications.

PKG of 25 screws