Photos of these bolts on a Nervar triple can be seen on my most recent post. The overal length of the nut is 18mm. The length excluding the head is 16 mm.
Regards,
Jerry Moos
Big Spring, Texas, USA
> From: Jerome & Elizabeth Moos <jerrymoos@sbcglobal.net>
\r?\n> Subject: [CR] WTB Old Style TA triple chainring bolts
\r?\n> To: classicrendezvous@bikelist.org
\r?\n> Date: Saturday, December 5, 2009, 9:48 AM
\r?\n> I'm looking for some old style TA
\r?\n> Cyclotourist triple chainring bolts. The old style
\r?\n> have nut with a slotted head like Campy or Stronglight
\r?\n> chainring nuts, whereas newer TA chainring bolts have nuts
\r?\n> with an allen socket. The older slotted style nut is
\r?\n> slightly longer, apparently because it was made for
\r?\n> chainrings without countersunk holes. Newer TA rings
\r?\n> have countersunk holes, so the nuts are slightly shorter for
\r?\n> the same chainring spacing. I'm actually using these
\r?\n> to build up a couple of Nervar Sport triples, which use the
\r?\n> TA bolt diameter for the inner ring only, and I'm two
\r?\n> chainring bolts short. The Nervar rings do not have
\r?\n> countersunk holes.
\r?\n>
\r?\n> Regards,
\r?\n>
\r?\n> Jerry Moos
\r?\n> Big Spring, Texas, USA