THE BUNG
The lexicon of off road (i.e. the words we use for shit) is a language onto itself. Try going into a hardware store and telling the guy behind the counter you want a “1 inch bung with left hand threads”… you are going to get a real strange response. I know, I’ve seen myself do it. Ever since Beevus and Butthead hit the screen, the term “bung” and “asshole” got linked together and trust me, good old Herb down at ACE hardware wanted nothing to do with a dude asking him for left hand threads in a bung…
However, go into any off road shop and ask the same question and you get results. They’ve got bungs coming out the ass. What kind would you like?
So, what the hell is a bung anyway?
Webster describes a bung as a hole in a cask or barrel about 2” in diameter. Thus, the popular term “bunghole” Herb over at ACE was so familiar with. It can also be used to describe a stopper that gets stuck in a flask, (I always called that a cork but what do I know?).
Somewhere along the line, someone decided to call the female threaded adapter that gets welded into the end of a tube thereby readily accepting the male threaded part that needs to be inserted (screwed) into the tube a bung. When you break it down like that it makes perfect sense doesn’t it. If you realy want the best term, call it a tube adapter but in my opinion that takes all the fun out the whole bung thing.
Where would we be without our bungs?
Our tie rods might have ball joints, our trailing arms would have sloppy rubber bushings and heim joints would have nothing to screw into. In short, without bungs we would be screwed.
Bungs come in all sizes.
Big ones, little ones, left ones, right ones, flat ended, cone ended, round and square….
You can rest assured that there’s a bung out there just for you.
How to pick your bung.
Bungs are measured by their outside diameter, which will correspond with the inner diameter of the tube you intend to insert it into. The thread pitch and hole size is also a consideration when selecting a bung, as this must match threads of the item you intend to screw into the bung. In order to correctly select a bung these two variables must be known; inner diameter of the tube and thread type and size of the item to be inserted into the bung.
Installing your bung.
Now that you have picked out the perfect bung, you have to stick it into the tube and weld it in place. You will find that the edge of the bung that seats into the tube has been chamfered creating a perfect weld area. (make sure you cut the tube off square so that your bung face is flat and level when it is inserted). Prior to final insertion and certainly prior to welding, drill at least a ¼” hole in the tube about an 1 ½” down from the end of the tube. Debur the inside of this hole so that the bung does not hang up when inserted. In addition to welding the full circumference of the tube and bung, the hole you drilled allows you to make a rosette weld further attaching the tube and bung together. This is better insurance than State Farm. Once welded up like this, yanking out your bung is next to impossible.
Using your bung.
The new piece you have made using your bung will have a new name. More than likely you now have a tie rod or a trailing arm that is ready to accept a heim joint (rod end) and get bolted up into your truck or buggy. These parts are strong, durable and ready for the rough stuff. Remember, next time you see somebody blasting ass across the desert it was the poor misunderstood and underrated bung that made it possible.
Well that’s it for now until I flog my blog again.
Ride Dirty…
Snakecharmer

