poppet/seat design allows no extrusion space, minimizing seal degradation under extreme pressures. Stainless steel valve springs and retainer rings are standard This is an ISO A Quick Coupling, the body size is 3/8inch (10 mm), both the male and female ends are NPT 3/8inch Female Thread. heavy-duty detent ball design for reliable connection time after time. A , fluid transfer quick coupling that provides higher burst pressure and superior to that of Aeroquip FD56 (5600) series and 6600 series, while providing half-for-half interchangeability. ISO A interchangeable couplings that can interchange with any ISO 7241 A quick couplings, no matter the manufacturer of the quick couplings., Manufacturer: Jnchdghwa