Bolt, 1/4 in 1/2 in long x 26tpi BSC with Norton slightly domes head, suit all British bike up to mid to late 50s, ZP [head is 7/16inch AF]. Used for front mudguard stays, number plate, rear mudguard stays 9584; 12342 - fixing pins (bolts) [headlamp bracket pin (1946); gearbox front chain adjuster plate pin; rear chain guard attachment pin; front mudguard stay attachment pin; rear mudguard bottom portion fixing pin; x 1