Comparison : Item # M34-1, 1-1/8 Inch (in) Hex Nut for Medical Air High Pressure Cylinder Connections
Item # M34-10, Handtight Nut (Brass) for Medical Air High Pressure Cylinder Connections
Item # M34-10P, Handtight Nut with Black Plastic Grip for Medical Air High Pressure Cylinder Connections
Item # M58-1, 1-1/8 Inch (in) Hex Nut for Nitrogen/Helium High Pressure Cylinder Connections
Item # M58-10P, Handtight Nut with Black Plastic Grip for Nitrogen/Helium High Pressure Cylinder Connections