Product review (4 stars): General Electric WH49X10042 Washer Agitator Coupling Kit
This agitator coupling kit was an exact replacement for the one our older GE top load washer. The plastic coupling just slips down over the splined transmission shaft and included a new galvanized steel mounting screw with a rubber O-ring seal. The part works as it should and the price here on Amazon was very reasonable as well, so I'm quite happy with the purchase.