1" box section square tubing end cap
thingiverse
Simple outside end cap for 1" steel box section furniture or welding projects. These caps just push over the end of the tubing to prevent it marking carpets etc. They should fit square section tubing of any wall thickness as long as the external measurement is 1". (25.5mm) The thickness of the end cap is 4mm and they need 16mm of tubing to push on to.
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