Footrest stud (left hand thread) 26tpi - 20 tpi
Fits all BSA A50 & A65 unit twins (Lightning, Thunderbolt, Wasp, Hornet, Firebird Scrambler, Etc) from 1962-1970. Fits many BSA unit singles (Starfire, B25, C25, Victor, B44, Etc) up to approx 1970. Also fits the Triumph TR25W Trophy from 1968-1970
Part numbers 40-4855 and 82-9047
