3/8" MPT Brass Sockets - Foster Quick ConnectsSeries ST Straight through couplings! Designed for use where minimum pressure drop is required and valving is not needed. Well suited for use on pressure wash, steam cleaning, and carpet cleaning equipment and many fluid transfer systems. FEATURES: Ball lock manual operation Smooth bore permits free flow of liquid. WARNING: over pressurization could result in a sudden failure of the coupling, causing severe bodily injury or death. Be sure to select