Adjustable Dumbbell Nut

Replacement Nut for Adjustable Dumbbell handle. This fits a custom ACME thread that is about .96 to .97" in major diameter with a 4 threads per inch or 0.25" pitch. Typical ACME thread for this size would a 1-5 thread (1" major diameter and 5 threads per inch) but the set I have [bought from Walmart] seems to have a non-standard thread which is no surprise.