This light has a 2 1/4" diameter lens

Part #8314 CHR

This is the kicker for you

check out How to Mount a Motorcycle Fender - Part 1 from back in 2010

standard for tapered threads used on threaded pipes and fittings

#8303 CAD Complete Stock Hardware Kit - 1958-1965 Harley-Davidson Panhead - CAD Plated Colony_Special_Order This light has a 2Complete stock hardware kit for Harley Davidson Panheads 1958 1965, CAD plated. Each kit contains all the stock motor nuts, bolts, washers and studs for your motor. The kit includes primary cover screws, lifter base screws, circuit breaker screws, case studs and nuts, timing plug, cam cover screws, cylinder base nuts and washers, oil pump nuts and bolts, transmission side cover nuts and washers, transmission top screws, transmission fill plug,