AN4 / JIC-4 weld bung for fuel, oil, and brake line connections in performance builds and industrial systems. The WB37-AN04 provides a permanent 7/16"-20 AN flare port in any weldable surface. Widely used in motorsport fabrication, custom fuel tanks, oil catch cans, turbo systems, and hydraulic circuits. SS304 construction handles fuels, oils, and corrosive fluids in high-demand environments.
Stainless steel 304 weld-on bung for installations in corrosive environments. Threaded for standard AN (JIC) male threads with 37 degree flare.
Need to cap an unused AN port? Pair this bung with one of our stainless steel Allen Key Slotted Plugs (PLG series) using an AN-to-metric adapter, or browse our full fitting lineup to find the right cap for your build.
