If there was only a on-line store like McMaster in Australia

Check this for a range of Cap Screws

Hmmm wonder how much air mail will be.. rofl... Actually how does McMaster prices compare to the place you people shop at?

Scroll down on this site for info on Tensile/Yield Strength of stainless (302/316) and 8.8, 10.9 and 12.9 (alloy) steel. Stainless maybe ok for electric, but others running Gas off-road R/C's have had them snap.