I've never come across a spec for these bolts. Just good and snug seems to work well - and check them every couple of months as they may work loose over time. To reduce slop in the platform, bed the beams (a forum search should yield several threads on this topic). I coated the threads on the inboard hex cap screws with a little copper based antiseize compound, and assembled the outboard nut and bolt dry, using a nyloc nut. Just use regular hand tools and don't go too crazy tight [the cracking noises will tell you when enough it enought <img src="http://www.catsailor.com/forums/images/graemlins/wink.gif" alt="" />]

These bolts control the hull alignment on a Hobie 18 - there is enough slop in the cross beam holes to affect toe out/toe in by an inch or two. To realign the boat, tramp tension must be relaxed first.

Chris.