Top Yolk Pinch Bolt & Nut, for use on BSA models: A7, A10, A65, A50, B25, C25, B31, B32, B33, B34, C10, C11, C11G, C12, C15, B40, B44, M20, M21 & M33. Triumph models: Tiger T20 Cub
Bolt O.E.M: 27-5135 / 97-2645 / H2645
Nut O.E.M: 64-6016 / 97-2646 / 29-5315