710
 

A few days ago I was having some work done at my local garage. A
blonde came in and asked for a seven-hundred-ten. We all looked at each
other and another customer asked, "What is a seven-hundred-ten?" She
replied, "You know, the little piece in the middle of the engine, I have
lost it and need a new one.." She replied that she did not know exactly
what it was, but this piece had always been there. The mechanic gave her
a piece of paper and a pen and asked her to draw what the piece looked
like. She drew a circle and in the middle of it wrote 710. He then took
her over to another car which had its hood up and asked "is there a 710
on this car?" She pointed and said, "Of course, its right there."

If your not sure what a 710 is, click here.

http://rtccom.net/~mfjgolf/710.jpg