Shock_Cord_Anchor_Fitting

Goes with Cap nut and takes two wrenching elements to assemble.  Needs a 3/8 wooden down to go through the hole.  Is designed to clamp up around a 1/4 inch long section of shoulder or coupler glued in one inch above the longest motor you want to fly.  This is a removable shock cord anchor that allows you to replace worn shock cords. 

It also doubles as a baffle.

This fits 29mm