C4 caliper bolt size

[SuffolkD@aol.com]

Kent:  I did the 1999 A6 caliper bolts and the 17MM socket and 7mm hex size 
escapes me.   The write up is here:
http://www.quattro123.com/A6FrontBrakes.htm
They seemed similar but different than the 200 20V which I wrote up here:
http://www.quattro123.com/200Brakes.htm
and the 4000Q:
http://www.quattro123.com/4000Qbrakes.htm

While the 4000 has NOTHING in common with the modern set ups a 200 V 4000Q v 
200 Cv bolt compario give you an idea of the likeness of certain fasteners 
with different fasteners styles.......... Tripple Square vs HEX
HTH -Scott by BOSTON
From: Kent McLean <kentmclean at mindspring.com>
Subject: C4 caliper bolt size

I'm replacing the brake pads on my '94 100 CS Avant, and I need to
know the size of the Allen-head bolt [1] that holds the caliper to
the carrier. The bolts are accessed from the inner side of the
caliper, in a hole covered by a rubber plug.

I did a web search and found "Torx", but pressing a clean sheet
of paper into the hole gave a greasy print that seemed to show a
regular 6-point hex opening.  A clear digital picture seems to
confirm it.  A 7mm Allen wrench fits loosely. An 8mm Allen wrench
doesn't fit.

Kent McLean