Product review (5 stars): Don't try to save few bucks when replacing agitator
I'm not sure why whirlpool doesn't include this in there agitator replacement kit. The washer that comes with this screw will definitely need to be replaced when replacing the agitator, so why save about $5 and risk water leaking to the motor. Just make sure you have a 6-point 5-16 socket with a long handle (at least 10 or 12 inches long) so you can easily install this...