Brass 45* flare fittings are a brass fitting with a 45* flared end which creates a sealed connection usually used with brass and copper tubing. Male straight fittings feature a flared tube connector on one end and male pipe thread on the other for threading into internally threaded mating parts. They come with either the same size tube/pipe thread or alternating sizes depending on the application. These fittings can be used with air, cutting oil, diesel fuel, fuel oil, mineral oil, refrigerant and water. They are highly corrosion resistant and can withstand up to 2,800 PSI.