Check out technology changing the life.
Brass Compression Tube Fitting, Union, 5/8' OD x 5/8' OD, 5pcs: Industrial & Scientific. Brass Compression Tube Fitting, Union, 5/8" OD x 5/8" OD, 5pcs: Industrial & Scientific. Size: 5/16" Barb x 5/16" Barb 。 Three piece construction - nut, sleeve and body with attached insert.Easy to disassemble no flaring tool required. 。 Use with copper, brass, aluminum, or plastic tubing. -65 Degree F to +250 degree F temperature range. Standard fittings use short nuts. 。 Brass for corrosion resistance, ductility at high temperatures, and low magnetic permeability 。 These fittings contain lead and are not allowed by federal law to be installed for potable water use in the U.S.A. and its territories. 。 Used for a variety of applications, not limited to grease, fuels, refrigeration, water, oil gas, and hydraulic systems. If you are unsure as to which NPT thread size you have ,please reference this chart that show you the NPT thread size crossed over the your linear measurement in inches. Note:NPT cannot be accurately calvulated with a linear measuring tool like a Tape Measure, Ruler or Caliper. NPT Thread size is NOT determined by its outside thread diameter in inches. 。 。 。