Early big twin shock post, shock absorber mounting stud

Shock absorber post, shock mounting stud. This shock post is an earlyversion used on some Eldorado and 850GT California. Extra stud lengthon outboard end allows attachment of additional items such as saddlebagmounts.  Note: the diameter of these studs is just under 13mm, the threaded end into the frame is ~12mm x 1.50, and the threaded end for the nut is ~10mm x 1.50.