A quick couplings are widely used in lots of equipments, hydraulic tools, mobile hydraulics and other equipments. The Features of this quick coupling Ball lock - the connection between male and female part are ball lock mechanism, super easy to connect and disconnect poppet valving - O seal ring to prevent the leakages, stable Zinc plated NPT 3/8inch Female Thread - NPT is a National Pipe Thread Standard, 3/8inch NPT Female Thread, Not mean the thread inner diameter is 3/8inch, you can check the thread, the inner diameter for the female 3/8inch NPT is about 0.58inch at the edge of the thread. Size :3/8inch NPT Thread Connector Type:Plug Thread Type :NPT Interchangeable with: HA15000 Series Female- Socket: HA1522100 Male - Plug: HA1522200 6600 Series Female- Socket: 6601-6-6 Male - Plug: 6602-6-6 Aeroquip FD56 Series Female- Socket: FD56-1064-06-06 Male - Plug: FD56-1062-06-06 Fast NV Series Female- Socket: NV 38 NPT F Male - Plug: NV 38 NPT M Safeway S56 Series Female- Socket: S565-3 Male - Plug: S561-3 Colour:silver Material:alloy steel Package Contents: 1 x Hydraulic Quick Connect set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. heavy-duty detent latch design for reliable connection time after time. unique 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 A Quick Coupling, the body size is 3/8inch (10 mm), both the male and female ends are NPT 3/8inch Female Thread. A , fluid transfer quick coupling that provides higher burst pressure and superior flow to that of Aeroquip FD56 (5600) series and 6600 series, while providing half-for-half interchangeability. A interchangeable couplings that can interchange with any 7241 A quick couplings, no matter the manufacturer of the quick couplings.