Aeroflowblack Male Npt To Barb Straight Adapter 3/8 " To 3/8 "Af841-06-06Blksold As Each Straight Male 3/8 " Npt To 3/8 " (9.52Mm) Barb. These Handy Npt To Straight Hose Barb Fittings Are Designed To Allow Easy Fuel Line Installation On Electric Fuel Pumps And Regulators When Using Rubber Fuel Line. They Have A Male Npt Fitting On One End And A Barbed Fitting On The Other End And They'Re Available In Different Sizes To Fit Your Needs. These Barb Sizes Are Designed To Work With Aeroflow 400 Series And 500 Series Push Lock Rubber Hose. Available In Various Sizes With Blue, Black And Silver Finishes.