On returning from a run, I discovered that the brake drum side bolt for the stand had dropped out and had machined some of the paint off the rear sprocket. Machine is a 1929
2 speed super. I found another bolt, but discovered that there is no clearance between the bolt and the brakedrum once it has been screwed in. There is certainly not enough clearance to put a nut on the thread. The stand alignment was slightly out (presumably a result of the bolt falling off) but straightening it in the vice, has made no difference to the clearance problem. The other side bolt has plenty of clearance.
I have measured the clearance between the inside of the frame rear wheel lug and the backplate on my 1930 2 Speeder and it is 0.450 inch. There is room for a 3/8″ nut but it must be positioned before screwing in the rear stand bolt if the rear wheel is in place.
My rear brake backplate is a club spares casting that I machined and it is a little thicker than the original one.
Coincidently I lost a rear stand bolt last September and the locking nut is essential if one is not going to loose the bolt. As it is a locking nut one can use a thinner nut if necessary, 1/4″ thick rather than the normal thickness.