These full radius steel bungs are 1" long x 3/4" diameter and are 5/16"-18 thread

7-inch mounting bracket

They are rated at 9 lb load per mount used

This light has a 2 1/4" diameter lens

This is the kicker for you

#8303 CAD Complete Stock Hardware Kit - 1958-1965 Harley-Davidson Panhead - CAD Plated Colony_Special_Order These full radius steel bungsComplete 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,