Also know that some stems need bolts with smaller than standard heads on them and washers with the proper O.D. are almost impossible to find if you can't salvage the old ones. This place has the proper bolts and washers but expensive. At least you can use this for reference so you can see what I'm talking about.
http://www.torontocycles.com/Selling...ium_Bolts.html Check out the narrow head bolts and washers near the bottom left hand side of the page. I don't have a comprehensive list of what stems need the smaller heads so measure yours if possible before going to the hardware store.