This hydraulic hose tube nut has a hose fitting A size of 1/4"-19 with male threading and a BSPP connection type, and a hose fitting B size of 9/16"-18, with male threading with a JIC connection type. This tube nut is meant to be used with hose dash size four, and is made from carbon steel, is rigid, and zinc-plated. This tube nut comes with a maximum working pressure of 4000 at 70 Degrees F.