The model is a Whirlpool Washer
LSR8010PQ0, the pin is 2" in length, flat on one side of shaft, has a hole in the body at the end, has a head, and appears to be some type of retaining pin. It fell from, (I believe as I had turned away as it fell, and did not see it fall), around the motor or transmission when I had just reattached the pump, after installing a new
Clutch Assembly and
Direct Drive Motor Coupling. I had no difficulties with the installation of these parts, and everything went back together without a problem. Please see attached scan. I was not able to locate it from the schematics for any system for this washer on Whirlpool website for this model washer.

