SA 3 speed hub w/coaster brake lock nut need

[guzziworksman]

I really need a locknut - I think it's part HM 132 - for my hub. It's nothin' more than a flat nut that holds the brake arm in place. I've attached a pic of my brake cone...plus a pic I got off the internet that pictures what I'm looking for. Anybody?
(The hub is a SA AWC 3 speed with co

aster brake dated 1996.)

 

[ABC Services]

I have 2 different sizes, Looks like it fits in there. What is that size?

 

[guzziworksman]

As I measure it...10mm.

 

[ABC Services]

Yes 10mm but from your picture Looks like the nut rests in the dust shield? what is that measurement?

 

[guzziworksman]

The brake arm (torque arm?) rests between two raised portions of the shield...the nut rests on top of the brake arm, securing it in place.

 

[ABC Services]

Is it a stepped axle, larger and smaller threads? If so which do you need?