Lock Washer, Intl Tooth-Stainless Steel #8 is a genuine Bunn OEM replacement part. Part number 20203.0100 is used for certain commercial beverage equipment made by BUNN. This part will help repair specific issues you are having with Bunnomatic model DUAL, DUALSH, DUALTF, DUALTTN, FMD5, G3, HW10, HW2, HW5, HW5-X commercial machines. Replace this part if BUNN or a service technician has instructed you to do so. Over time Washers may need to be replaced because of normal wear and tear or if damage has occurred to the existing part. When replacing BUNN part #20203.0100 it is suggested that no power or water is connected to the machine and you are working in clean and non hazardous environment. Please be sure Lock Washer, Intl Tooth-Stainless Steel #8 fits your specific needs.