This series of couplers are the most common quick connect couplers used in the agriculture, construction and logging industries. They are interchangeable with all ISO 5675 series including ball seat valve, poppet seal, push-pull couplings. ISO Body Size: 3/8. Port Thread: 3/8 NPT. This 3/8 coupler set consists of a male and female quick coupler. Features: 5,075 PSI Rating. 8 GPM Max Flow. Hardened Steel Plugs. Buna-N Seals with Teflon backup ring. Poppet Valve. Female Length: 2.38 in. Male Length: 1.57 in. Hex: 0.94 in. Included: Female coupler, Male coupler.