McMaster 7739K178 High Pressure Galvanized Steel Pipe Fitting Union Straight Connector, 1 1 2 NPT Female 3P639 Range 40 Degrees to 212 Range 40 Degrees to 212 Degrees F Standards UL 94 HB Legend Danger Locked Out Do Not Remove Includes Knockout Center Minimum Temperature 40 Degrees F Maximum Temperature 212 Degrees F Header Danger For Maximum Handle Thickness 2 in Language English The head is designed to grip pipes and is ideal for pipe work such as water and gas supply maintenance and construction For Use With Air Union Body Shape Hex Pressure Class 3000 Fabrication Forged Connection Type Pipe Connection Style Threaded Connection NPT Female Pipe Size 1 1 2 Dash Size 24 Length 3 3 64" Hex Width 3 27 64" Maximum Pressure 3