edge industrial brass reducing hex bushing 1" male npt x 1/4" female npt fuel / air/ water / oil/ gas wog (qty 01) edge industrial 1" male npt x 1/4" female npt reducing hex bushing fitting. used for a variety of applications, not limited to grease, fuels, refrigeration, water, oil gas, and hydraulic systems. working pressure of 1000 psi. temperature range of -65°f to 250°f (-53°c to 121°c). meets the standards of asa, asme and sae. not deemed lead free. not for use with potable water. please note: npt thread size is not determined by its outside thread diameter in inches. please review our attached npt sizing chart to cross reference npt thread size to linear inches