Flare Nuts & Fittings Brass Nut / Fitting Reducer 1/4 Brass Nut Reinforzed 5/16 Brass Nut Reinforzed 3/8 Brass Nut Reinforzed 1/2 Brass Nut Reinforzed Add to Cart Add to Cart Add to Cart Add to Cart 5/8 Brass Nut Reinforzed 3/4 Brass Nut Reinforzed Add to Cart Add to Cart