Stud and nut for securing magneto to crankcase, each, for early Norton twins <1957, ZP stud and nut Suits Models 7, 77 88 99 etc to approx 1956. Later models had same studs with smaller nuts. Original part numbers: T2089 ; 067581 - bolt securing magneto to crankcase E3223 - nut for bolt securing magneto to crankcase E5456 - washer for bolt securing magneto to crankcase