edge industrial 1/4" hose id to 1/2" male npt mnpt straight brass fitting fuel/air/water/oil/gas/wog (qty 1) edge industrial 1/4" hose id x 1/2" male npt brass barb fitting. 150 psi maximum working pressure. -40° to 160° temperature rating. 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