Post #10058

There is one last thread type I want to show you today.... pressurized hydraulic fittings are similar to the flare fittings I just showed you but they have a different angle on the flare. Again, if you find a thread or a fitting that doesn't fit something else, there's a reason for that. Hydraulic connectors have to routinely handle 3000psi 200bar. To make sure that other tubing doesn't explode, engineers designed hydraulic fittings to not work with other connectors. JIC is an American hydraulic thread type. Joint Industry Counsel specified these connector types in the 1940s for hydraulics used on airplanes. We now use them on most hydraulic cylinders on tractors. There is a metric version of this called DIN and there is a british version called 60 degree Whitworth Cone (BSP British Standard Pipe). The fun detail about the BSP is that it specifies the diamter in mm and the threads in threads per inch. What fun!