G'day Martin,
Just happened to turn my computer on over lunch.
I've found these guys to be really good. I've had to source long bolts for deep tuttle boxes etc.
Some of the SS bolts have the Allen Key hex head which is the same size as the batten tensioning tool, which is handy.
Braeside....
www.cylex-australia.com/company/melbourne-bolt-co-pty-ltd-15113066.htmlThere's another one in Dandenong on Frankston-Dandy rd if you need it.
All the best
-Bondy