Thanks Greg, My old eyes are not what they used to be. 75mm X ?. Are these M6 or M8 or what and fine or course thread?FWIW Harley's mounting kit lists bolts 75mm long. The Front fender bolts are 40mm, and the rear 25.
Therefor I assumed that the spacers I needed to make equaled 75 - width of saddle bag support - 40 or 25 (front or rear).