TracTuff Filler Cap Assembly
TracTuff billet filler cap & bung is designed for use with my 3" and 4" billet tank lids; they match perfectly to the lids ID for a simple inside weld that you cant see once finished. On occasion, I have used them for odd projects, as long as there is a 1-1/2" hole.
NOTE: The cap and bung have a 1-5/16"-12 thread and use an o-ring to seal. O-ring is included.