Hydraulic hose fittings and adapters are widely used in hydraulic systems to connect hoses to other hydraulic components such as valves, actuators, and cylinders to allow fluid conveyance. Although hose fittings and adaptors seem to be very tiny parts of the hydraulic systems, they perform very critical roles in providing strong and secure connections by maintaining safe pressure and preventing potential leakage. 

Carbon steel: #45, #35, #20, 08F. Price could vary greatly with different materials been used, with most expensive #20 #35 and least expensive 08F. Sometimes you getting cheaper ones is only because your supplier is using cheap steel. It is not always a bad case as you could happen to just need cheap steel. Let's say your hydraulic system is not very demanding in pressure, it is economic to use 08F rather than #20 #35. Nevertheless, if your hydraulic application is critical in pressure, it is rational to buy #20 #35 #45 to avoid any potential explosion. 

The most common plate is zinc plating, also known as Cr3+ plating. However, the price could again differentiate with same plating. Therefore, it is smart to ask about corrosion resistance time, also known as salt spray test hour. Usually, the industry standard is 96 hours, but prices make differences. It could be as low as 72 hours, or as long as 560 hours or above, depends on your specific needs. On the other hand, there is other kinds of plating such as Nickle zinc plating, which is more expensive and of course for more demanding applications.

The most popular standards of hose fittings and adapters are SAE and Eaton. They differ in hexagons as people in different countries use different wrenches. Overall SAE and Eaton standards are interchangeable, but countries do have their own preferences. Therefore, it would be wise to make sure which standards you use and inquire accordingly. 

When it comes to price, you may often hear suppliers asking how much you want to buy. As you can see, the reason is that mass production is more efficient and less expensive for the factory.If a production line needs to switch orders back and forth, efficiency suffers. If you are buying in bulk, you can ask your Chinese supplier for more price support.

China's outstanding manufacturer of hydraulic hoses. Liujin dedicated to the development and manufacture of hose fittings, hydraulic adapters, hose assemblies and other related products that are widely used in mining, machinery, transportation, shipping, and oil fields.