1/2 in SAE 45 deg Brass Flared Tube Fitting. Same as our NS4-x series but in smaller quantities. Please see NS4-8 for package of 25. Jb machines all of the brass fittings at the factory in aurora, illinois using the highest level of brass consisting of 65% copper and 35% zinc. This gives our brass fittings a high tensile strength while resisting corrosion. Many import fittings use less quality brass with lower copper content and a higher failure rate. Our brass fittings may be used with copper, brass, aluminum, steel, and plastic tube provided an acceptable flare could be generated with the material. Vacuum pressures of 5000 psi can be handled depending on the size, material, and conditions. Using a 4:1 safety factor, the following general rule is used: 3000 psi to 1/4 in, 2000 psi to 1/2 in, and 1500 psi to 1 in. Long nuts are recommended when vibration is a factor. Tubing should be double flared in extreme applications to minimize flare thinning on over-tightening. Our brass fittings generally comply with SAE, ASA, ASME, and MS standards. However, when design make dimensions critical, please contact us at 800-323-0811. Heavy duty arc tube fittings generally conform to SAE, ASA and ARI standards for marine, hydraulic, and refrigeration service. Long dry seal pipe threads minimize leakage and provide more clearance for tightening flare nuts. Shapes, elbows, tees, etc are made from forged brass to maximize strength and eliminate cracks. Tube size listed are OD. To determine nominal size, subtract 1/8 in. Pipe sizes listed are standard nominal pipe size and threads are to dry seal taper pipe standards. JB will provide flare fitting to SAE standard J513 whenever possible. In some cases, slight deviations will occur when full compliance fittings are not available. Our tube fittings are make and break, have good vibration resistance, economical, easy to assemble, and have a wide selection. Made in the USA.