I-Washers zizinto eziyimfuneko ezisetyenziselwa uluhlu olubanzi lwamashishini kunye nezicelo zokusabalalisa umthwalo, ukuthintela ukukhulula, kunye nokubonelela ngobuchwephesha be-fasteners.Ngaphezulu kweminyaka engama-30 yamava, siyazingca ngokuba ngumvelisi ophambili weewasha ezikumgangatho ophezulu.