... connecting pipes ASTM A105 Pipe Unions, Carbon Steel, 3000 SCRD, Size 3/4 Inch, Galvanized Surface Treatment ... Galvanized Surface Industrial ASTM A105 Pipe Fitting Union, Class 3000, 3/4 Inch, MSS-SP-83 Standard, NPT ... Threaded ASTM A105 Pipe Union with NPT ends, 3000# class rating, 2 inch in size, meeting the MSS- ... ASTM A182 F316 Pipe Unions with NPT Ends, Class Rating 3000#, 1/4 Inch in Size, or as ...