Precision machined from solid steel bar stock which provides longevity during mechanical shock in rugged applications. These couplers are interchangeable with the Industrial (Hansen or Milton) Standard series couplers produced by other manufacturers.1/4 Inch Industrial Steel Coupler x 3/8 Inch Easy-Lock, PK 6 Maximum working pressure 300 PSI..
. These couplers are interchangeable with the Automotive (True-Flate) Standard series couplers produced by other manufacturers. Precision machined from solid steel bar stock which provides longevity during mechanical shock in rugged applications.3/8 Inch Automotive Steel Coupler x 1/2 Inch Female NPT, PK 50 Maximum working pressure 300 PSI.