5/8-11 UNC TO 3/8-24 THREAD ADAPTOR5/8-11 UNC TO 3/8-24 THREAD ADAPTOR 84647, 5/8-11 I.D., 3/8-24 O.D. On most threaded cup wheels 5/8"-11 is the common mounting thread, but other smaller threaded I.D.'s are available. But to solve this problem you can use these handy adapters! Three sizes are available and the outside diameters on all of them is that 5/8"-11 thread. The I.D. sizes are M10x1.25 #84645, M10x1.5 #84646 and lastly a 3/8"-24 which is a #84647.
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