AVS throttle screw retainer

i have a picture, but can't get photobucket to take it right now, but the 3 AVS'S i have are all the same. in that tab were the idle screw goes is this ivory colored bushing that pushes into that tab from the back side. the screw and spring then thread into it and spread it to hold the idle screw firmly, it works like the inserts that one would put in sheetrock to hold a screw. thanks Gerry