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Threaded Bungs Fitted In Tubing

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8. We cut the Synergy chromoly tubing to length, cleaned the ends and drilled two 3⁄8-inch holes on each end. The holes are used for rosette welds on the threaded bungs. The bungs are also welded around the circumference. We insert a cruddy bolt into the bungs during the welding process to keep weld boogers out of the threads.