This part has been replaced by version 2.0: http://www.thingiverse.com/thing:3843
This is a parametric one-piece y-bar clamp. It replaces two y-bar clamp pieces from Mendel or Mini Mendel, and requires no screws! This is part of a larger project to overhaul the entire Mendel / Mini Mendel Huxley design to make the printable parts print faster and the non-printable parts easier to obtain.
The smooth rod goes through the flat side, and it is pinched by nuts on the threaded rod through the rounded side. Nylock nuts are recommended. The M8 version is for Mendle, and the M6 is for Mini Mendel Huxley.