I've been meaning to post this -- If by chance anyone is using the Triumph sissy bar with EZ brackets, they might want to increase the length of the EZ bracket socket head bolts to 70 or 75 mm long. (The thread setup is 8 x 1.25) The sissy bar brackets significantly increase the distance from the bike side of the EZ bracket's mounting pins to the fender's threaded boss. There's a whole lot of stress going on between both the weight of the bags and the possible push of a pillion rider or wind load against backrest to have it all on two or three threads per bolt. Then mix in some road spray and subsequent corrosion on the mostly exposed threads within the bosses...
With the sissy bar, bolts shorter than 70 or 75 mm are likely threaded into the fender by only a few threads. I learned this lesson the hard way, and lost a half day of travel getting it fixed. If anyone has concerns of this, try reaching into the fender bosses with a toothpick or seal pick, and see how much open thread you have. IMO, there should be little or no open thread area inside the fender bosses, as there isn't any excess depth of thread in there to begin with. The total amount of thread depth in the bosses is around 1/4".
The bad news is, I believe you'll find like I did that most hardware stores don't stock 8 X 1.25 X 70 or 75 mm socket head bolts. If per chance they do, beware of low quality imports.
These folks seem to have the right stuff -
http://www.boltdepot.com/product.aspx?cc=25&cs=132&cm=77&cd=1607
as do these folks, in stainless
http://www.mmsacc-stainless.com/metric/html/metric_allen.html
Sample of a socket head bolt:
