The Whirlpool W10877037 Spray Arm Nut helps secure the dishwasher spray arm in place for proper water distribution during wash cycles. This replacement nut is designed to hold the spray arm firmly on its mounting point while allowing it to rotate as intended when water pressure is applied. A properly secured spray arm supports consistent water coverage, helping reach dishes throughout... https://www.partsmelange.ca/whirlpool-w10877037-spray-arm-nut-for-dishwasher