Thanks Schwinn !

[Walker]

Stopped at my local Trust Worthy Hardware store last night to get replacment chain / axle adjuster bolts for "the project". So those bolts are 1/4" and some kind of obscure thread pitch? The guy was stumped.

Frustrting.

I seem to have misplaced my thread pitch guage, can anyone shed some light on the specs for these bolts? (1937 Schwinn middleweight). I was hoping to find stainless steel with an allen head or something.

 

[B607]

I need a pair too. I just pulled one out of my '41 Schwinn and measured it. It is 1/4 X 24, but might be a slightly different pitch than standard 1/4 X 24. I also thought about getting a couple Allen head machine screws and then turn the point on a lathe to get the right shape. I saw a pair on ebay just sell for $10 and they were brand new. I was asleep at the switch and missed them. By the way, Schwinn didn't make their first middleweight until 1954. You either have a balloon frame or a lightweight frame. Gary

 

[Slick Rick]

Have you guys tried Memory Lane Classics? Seems to me this is something they used to stock.

 

[maddogrider]

I ran a 1/4 24 die over mine and the bolt seamed to work just fine after that, but the head set and bottom bracket i had to buy new because all the stuff i had layin around was 20 threads per inch and the Schwinn is 24 threads per inch my lbs helped me with that. Hope it helps you guys.

 

[Walker]

I might check McMaster Carr or look around on-line. I was just hoping to beautify an otherwise boring fastner.

 

[Fireproof]

Maybe you can find one of these that leaves just a few threads showing . . .
http://www.mcmaster.com/#set-screws/=1k7dce
. . . and then top it off with a nice acorn nut . . .
http://www.mcmaster.com/#nuts/=1k7ft5
I just noticed you mentioned 1/4-24 . . . I don't see that size listed???????? :?
I found this . . .
http://www.boltdepot.com/Newsletter/New ... 06-04.html
The following is from the above site . . . "Strange sizes - 5/16-20 and 1/4-24?!?
It’s happened to the best of us. Your project is in pieces and you need a replacement screw. It looks like a 5/16ths screw but it has 20 threads per inch. That’s not a standard size and you are starting to wonder if you will ever be able to find a replacement and get your project back together again. Don’t worry, 8mm metric screws are almost indistinguishable from 5/16ths and the standard 1.5 pitch is almost exactly 20 threads per inch. So if it looks like 5/16-20 it’s actually metric 8mm x 1.25.
The same is true for what appears to be 1/4-24 (another non-existent size) which is actually 6mm x 1.0."

Let us know what you come up with.

 

[rick74304]

If the above post wasnt enough, heres a little more;
http://sheldonbrown.com/gloss_ta-o.html#threading

Thanks Sheldon!
Rick

 

[B607]

Have you guys tried Memory Lane Classics? Seems to me this is something they used to stock.

You're right. I should have done that right from the start. Gary