Help improve equipment reliability and avoid production delays with quality hydraulic fittings from Grainger. Choose from our huge selection of compression fittings, flange fittings, and hose adapters and plugs available in the sizes, finishes, and working pressures for many of your applications. Our assortment of hydraulic hose fittings includes crimpable models that are ideal for on-site and in-the-field repairs. We have hydraulic quick couplers that allow easy connects/disconnects and are ideal for most agricultural, mobile, and industrial equipment applications. Our sight plugs can easily show you the presence of oil in gear cases, bearing housings, or indicate liquid levels in reservoirs. Find a split flange kit to ease the installation of tube, hose end and split flange adapter connections especially in tight spaces.