It's the right bolt. Part # 4752 7/16 1 1/4 hex head. I got a replacement at Lowe's.
This site :
http://partsfinder.onlinemicrofiche.....asp?make=hdmc
Is a huge help in finding part numbers. My bike is an 05 FLHTI. Vin code is FV.
You can order right from them, or use the info to find the aftermarket part by googling the part number.
Some stuff like bolts and wire connectors are priced right, but I got the $68 motor mount for $20 from Drag Specialties.