3/8" OD Tube X 1/4" NPT Pneumatic Fitting Straight
Product Description:
Material: Brass , Plastic
Type: Push To Connect Straight Fitting
Thread Size: 1/4" NPT
(actual thread outside diameter is 0.540")
Tube Size: 3/8" Outside Diameter
Operating Pressure: 0-150 PSI, 0-1.0MPA
Vacuum: 0-29.5 in Hg, 750 mm Hg
Threads Have Sealant, No Taping Needed
Made For: 3/8 Inch "Outside Diameter" Tubing
Package Included: 10PC 
Note: Tubing Outside Diameter Must Be 3/8 Inch