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This hex coupling assortment kit contains: 1/8"× 1/8" npt female-1pc; 1/4" ×1/4" npt female-1pc; 3/8" × 3/8" npt female-1pc; 1/2" × 1/2" npt female-1pc (5pcs)
For use with LP and natural gas, refrigeration, and hydraulic applications
1200 PSI working pressure, Temperature range of -65°F to 250°F (-53°C to 121°C)
Brass for corrosion resistance, ductility at high temperatures, and low magnetic permeability
NOT DEEMED LEAD FREE. NOT FOR POTABLE WATER
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.