Expander Plugs or Sealing Plugs, Pipe Plugs Brass (3/4") NPTF, Alloy Dry Seal (3.4") NPTF, Stainless Dry Seal (3/4") NPTF, Alloy Flush Seal (7/8") NPTF SAE Port Plugs Providing SAE Port Plugs in the United States under the strict SAE J514 standard.