This is a simple printable M5 washer. The stl files are for a single print, a plate of 12, 36 and a full plate of 64. I have uploaded my originals as well as the fixed files from cloud.netfabb.com/ just in case there is a difference. Dimensions were derived from en.wikipedia.org/wiki/Washer(hardware) )(hardware) is part of the link but Thingiverse doesn't recognize it even if the link is hard coded...?1.) Download the file(s) and Skein it with your favorite settings 2.) Print washers until you need no more 3.) Enjoy the savings at only pennies per hundred and no wait from McMaster Carr (or shipping charges for that matter!)