Hi Stevan,
I agree that the bolt from Jerry's bike is not correct. As far as making reproductions goes I've already done that. I didn't use hex stock I milled the heads. They are made from stainless steel to avoid having to chrome plate them.
Dale originally asked me to make him a couple. Then Sterling Peters heard about it from Brian Baylis and he wanted 3; so I made about a dozen extra. I few other people asked about them as well, but I've forgotten who they were (sorry). In any case, I still have some if anybody wants one they are $50 each including domestic postage.
As you describe, they have 10 mm hexagonal heads. The shank is 7 mm and there are 2 special washers. The top of the bolt head as well as the nut are slightly crowned. The end of the bolt is crowned to match the end of the nut. In a perfect world the nut would snug up to the exact point on the threads so that their respective crowns would match up to a perfect smooth radius; but I've never seen one that does.
Here is a picture of a NOS Cinelli bolt that sold on ebay for $ 225 - yikes!
http://www.centerportcycles.com/
Here is my knock-off:
http://www.centerportcycles.com/
Jamie Swan - Northport, N.Y.
NortonMarg@aol.com wrote:
> In a message dated 10/28/03 3:19:42 PM Pacific Standard Time,
> jerry@proactivesports.com writes:
>
> > I acquired a mid 60's Cinelli track frame last summer that had a 2 piece
> > seatpost binder. The bolt is about 6mm X 37mm with a 12 spline hollow headed
> > head with a shoulder washer built in. The nut is pretty standard looking 8mm
> > with a shoulder washer. Anyone ever seen something like this on an early
> > Cinelli? I don't have image hosting but I can e-mail an image if anyone wants a
> > look.
>
> IIRC, the originals were a 10mm hex, with the shank turned down from that and
> threaded on the shaft so that another 10mm hex nut finished the job. If you
> had some 10mm hex stock, you could make your own bolt and the nut.
> Stevan Thomas
> Alameda, CA