Jerry- Those bolts look similar to current tubeless valves. But I have no real idea what they're for, as you can tell.
> I've just built up a Duravia-badged Mecadural aluminum French randonneur
> with 50's Normandy circular-hole hubs with soild axles and alloy wingnuts.
>
> In the bag with the hubs were these bolts. I have no clue what they are
> for, or what connection, if any, they have to the hubs. I bought the hubs
> off French eBay, but the aucion has been takn down now, so I can't check
> it to see if any explanation was given for the bolts:
>
> http://www.wooljersey.com/
>
> The bolts are 5 cm long and about 5 mm in diameter. They are alloy and
> hollow. most of the length is threaded, but the ends are smooth and there
> is a knurled section in between. They have a flat washer, a hex nut and a
> knurled nut. The heads are circular with round holes - at first I thought
> the were allen heads, but they are round holes, no wrench purchase. The
> heads are marked: Devaud Freres Cluses. Beautifully made item, no clue
> what they are. Anyone?
>
> Regards,
>
> Jerry Moos
> Big Spring Texas, USA
>
>
>
>
> _______________________________________________
Andrew R Stewart
Rochester, NY