Help with how to weld 1/2" nut on end of 1.25" sq tubing

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I'm working on a small project currently and I'm trying to figure out how best to do the following:I'm using 1.25" square tubing and would like a 1/2" threaded hole on the end.  I thought there might be inserts similar to what they have for round tubing but can't find any.Is there a better way then to - cut some plate to size, drill a hold larger than 1/2", weld nut onto plate, then weld onto tubing?
Reply:Originally Posted by TeCKis300Is there a better way then to - cut some plate to size, drill a hold larger than 1/2", weld nut onto plate, then weld onto tubing?
Reply:I just did this when I put casters on my welding table.Cut a square out of 1/8" that's less than 1.5" (but not small enough to fall in the tubing), this way you have a corner to fill in with weld, it makes for a nice finish and leaves a gap for full pen. Fine the center by scribing with calipers and drill a 1/2" hole and (tig) weld the nut on. Cool the part and run a tap through the nut into the plate (the plate will be in the way slightly, I dont recommend skipping this step). Then just weld it on to the tubing.Last edited by MikeGyver; 08-14-2011 at 03:36 AM.Welding/Fab Pics: www.UtahWeld.com
Reply:You can also screw in a bolt with some anti seize on it to keep from messing up the threads and help keep it straight Don't over heat the nut as it will soften the threadsBacked my CATMA over your CARMA oops clusmy me  What would SATAN do ?? Miller Trailblazer 302 AirPakMiller Digital Elite  Optrel Welding HatArcair K4000Suitcase 12RC / 12 VSHypertherm PM-45Rage 3 sawRusty old Truck
Reply:Or use thicker plate and drill and tap a whole.Millermatic 252millermatic 175miller 300 Thunderboltlincoln ranger 250smith torcheslots of bfh'sIf it dont fit get a bigger hammer
Reply:http://www.ballisticfabrication.com/...pters_c_7.html.
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Reply:If you used a square nut, you could notch the corners of the end of the tubing such that each edge is the same dimension as the side of nut at the end, bend the sides in to form a smaller ID square the same size as the square nut OD and weld it up.  Run a tap in when done if you don't use a bolt and anti-seize.MM200 w/Spoolmatic 1Syncrowave 180SDBobcat 225G Plus - LP/NGMUTT Suitcase WirefeederWC-1S/Spoolmatic 1HF-251D-1PakMaster 100XL '68 Red Face Code #6633 projectStar Jet 21-110Save Second Base!
Reply:Duane,Why would you want to go that route? Those weldnuts are way cooler.Lincoln Power Mig 210MP MIGLincoln Power Mig 350MP - MIG and Push-PullLincoln TIG 300-300Lincoln Hobby-Weld 110v  Thanks JLAMESCK TIG TORCH, gas diffuser, pyrex cupThermal Dynamics Cutmaster 101My brain
Reply:Originally Posted by Joker11Duane,Why would you want to go that route? Those weldnuts are way cooler.
Reply:Originally Posted by Jimmy_pophttp://www.ballisticfabrication.com/...pters_c_7.html.
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