A weld-in bung is how you add a proper AN or NPT port to a tank, oil pan, valve cover or fabricated housing. Weld the bung to the vessel, thread in the matching fitting, and the port seals on a machined surface instead of a drilled hole.

Fragola 597112 Features:

• -12 AN Male Steel Weld Bung
• Weld-In Installation for Tanks, Oil Pans and Fabricated Housings
• Machined Sealing Surface for a Leak-Free Port
• Adds AN or NPT Port Where None Exists