and the threads are 24 TPI

Right hand thread

minimum wear and tear

7/16-24 Thread

If you're having an issue with it

#8306 CAD Complete Stock Hardware Kit - 1940-1948 Harley-Davidson 74 & 80 Aluminum Head - CAD Plated Subcategory_Axles and the threads are 24Complete stock hardware kit for Harley Davidson 74 & 80 Side Valve with aluminum heads 1940 1948, 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,