Triumph 350 500 650 Primary Oil Level Plug And Copper Washer Up To 1967 PN# DS57 70-2441 E2441

Primary level plug and copper washer for 1959-67 Triumph unit 350 & 500 twins and 1963-67 Triumph unit 650 twins. Plug is the correct 1/4″-26 CEI thread ds57 domed bolt. While early unit twins called for WE170 fiber washer, later twins used E2441 (70-2441) copper washers which are an improvement over the fiber washers and are a direct replacement. ***Note- 1968 parts books called for these as well, but we’ve seen original 1968 models fitted with both 1/4″-26 plugs and the 1/4″-20 plugs fitted to 1969 and later Triumph twins. If you have a 1968 model year, we recommend verifying threads prior to ordering. For the 1969 onward primary level plug click here The product images shown are for illustrative purposes only and may not be an exact representation of the product received. Manufacturers occasionally make minor cosmetic changes to items, such as color, finish, label, or design. These changes do not impact the item’s function or compatibility. Please contact us if you have specific concerns regarding appearance.