Norgren pneufit m0040 series union elbow push in fittings metric norgren m00400400 this union elbow is from the pneufit m series of metric push in fittings the elbow is ready to use and enables fast assembly with no need for tools hoses when installed are securely anchored and there is a releasable stainless steel grab ring that grips nylon or polyurethane tube 85 or 95 durometer the fitting has nickel plated brass components that provide corrosion and contamination resistance and exte