It is a known fact that these great threaded inserts or bushings in simple words, are used in repairing stripped holes. These are also widely used in mold and cast threads thus eliminating a whole machine operation. It eases the task as you just have to thread the insert through. If the material is too thin to accept a thread, these threaded inserts come in handy. They are used as a changeover from metric to unified threads.
A Hydraulic Valve is a directional valve that regulates and directs the flow of a liquid medium, usually the common fuel, oil, in the hydraulic systems. The proper performance of a hydraulic system is solely based on the valves used in them. So it is very important to engage the right valves of the correct measurements.