Plug

This was a replacement part for a foot pump. The plug was used to lock the foot pump in the closed position.

Design removed and replaced with the flat disk you see, feel free to email for the original if you want it. See following link for details http://traverseda.wordpress.com/2014/05/23/makerbot-blatently-steals-and-patents-a-community-design/

For alternatives to thingiverse see http://www.reddit.com/r/3Dprinting/comments/26do2z/alternative_repositories_to_thingiverse/