The screws (yes, slotted-head screws were original) for the Simplex Retrofriction shifters are different between the braze-on and band-mount sets. Simplex part # 3673 for the band-mount and #4286 for the braze-on. The bad-mount screws are 8mm long, and the braze-on screws are 17.5mm. I just checked, and both examples I have screwed into a Campy shifter boss just fine. I always though the screws were standard metric thread, and my examples seem to bear that out. Can't really comment on what others have experienced, but my samples came out of original Simplex parts bags. There are many pieces that fit both assemblies, but a few exceptions too.
Which, of course, brings me to the fact that I have many of the replacement parts for these shifter systems. Unfortunately, so far I've only found a very few of the longer, braze-on screws (4 actually), whereas I have dozens of the shorter screws. There are a few other gaps in the stock, such as the band-mount. I haven't found any of those, at least not yet. -- Wayne Bingham Lovettsville, Virginia USA
On Sat, Jun 13, 2009 at 12:08 PM, Aldo Ross<aldoross4@siscom.net> wrote:
> Installing a set of Simplex Retrofriction shifters last evening, I realized
> the included slot-head bolts are threaded French while the bike is threaded
> Italian. I found some socket-head bolts that will work, but the heads
> stick-out pretty far and look awkward.. Are there any D-ring bolts long
> enough to do the job? What type of bolts did Simplex provide... where they
> all slot-head?
>
> Aldo Ross