what do you guys think of this combo?
http://www.probolt-australia.com/stainless-steel/stainless-steel-bolts-and-washers-countersunk/stainless-steel-countersunk-bolt-m6-x-1-00mm-x-25mm.html#.VBk2Z_na58F
http://www.probolt-australia.com/aluminium/aluminium-bolts-and-washers-countersunk/aluminium-countersunk-washer-m5-red.html#.VBk2xfna58E