US Patent 7819603 Snap-together design for component assembly

A snap-together assembly mechanism includes a first body having a projection defining a reduced diameter portion and a shoulder. The assembly mechanism also includes a second body defining a trough which receives the projection, the trough including a web spanning the sides of the trough, wherein as the pin enters between the web and the trough, it momentarily stretches the web until the shoulder passes the web, wherein the web snaps back once it is aligned with the reduced diameter portion of the projection.