Camburg 1in. RHT Round 4130 Thread Bung (stepped) [1.50 x .120]Our Camburg threaded bungs are machined in house from aircraft quality 4130 chromoly, not cheap mild steel or imported low quality material. These are a stepped design to match the OD of the tubing being used with a chamfered fillet for MIG or TIG welding them in. We offer these is a wide range of sizes for different heim rod end sizes and tubing sizes. You can use these to custom build tie rods, upper control arms, lower and upper links trailing arms