I bought a well-used 1989 Dahon Getaway V 16" folder for $50 that was missing the button/latch that connects the old style brace and steering mast together. Three plumbing parts totaling $20 and the bike is rideable!

The brace is threaded and looks like it should accept a 1/2 SAE bolt...but the braces threads are too fine. So I looked in the plumbing section and found this 1/4 Nipple which threaded in perfectly snug and secure.



I don't understand the sizing protocol...but THIS FIT!
plus the unthreaded band in the middle means that the brace and the plate on the steering tube don't rub against each other.



I threaded the 1/4 nipple into the bottom of the bracket:



It then fits into the top of the steering tube plate:



I then threaded on the end cap:



Finger tightening is just enough. Too tight and the steering is difficult. Although, not necessary, I then put an end cap on the top, just for extra security.



When undoing the connection to fold the bike, I screw the cap back on the threads:



The fact that the threaded shaft (or "nipple") threads into the brace means the only looseness or play, would be in the steering mast plate...but when finger tightened there is no play to be felt!!! It is remarkably solid.

Because the original spring/button latch is hard to find, I wanted to share my DIY success with anyone in need of a solution!

I've been out for a couple of rides around the neighborhood and all seems good with the brace. I've sorted out the gears and brakes and removed the broken front fender; the rear was already gone.

Eventually I will replace the fenders, add a front rim brake, and possible replace the rear drum with a rear caliper brake, replace the rear 14/28 gears with an 11/28 or 11/32 for higher gearing and possibly replace the handle bars with something more like bull bars without compromising the fold.

If you have any questions you can message me through Bike Forums or better yet quote me BobbyG so that I get an email alert.