Clutch plate Friction for 3- and 4-spring clutches.
Made by Surflex
BSA 1958 up: B31, B32, B33, B44, A7, A10
BSA A50, A65 1966 to 1972
Triumph twin models (350, 500, 650, 750cc, etc.) (1946-83)
Part numbers: 42-3192, 57-1362, 57-7058, 42-3262, 57-0414, 57-414, and 68-3267
See photo 2 for dimensions.