Coupling Reducer Nut Zinc - 1/2"-13 to 3/8"-16 (5/8" F x 1-1/4" L)- Qty-25 Go to amazon.com Related posts Top 7 recommendation coupling nut 5/8 for 2022 DescriptionCoupling Reducer Nut Zinc - 1/2"-13 to 3/8"-16 (5/8" F x 1-1/4" L)- Qty-25