1" box section square tubing end cap
thingiverse
Simple outside end cap designed for 1" steel box section furniture or welding projects, where it's essential to prevent damage from metal marks on carpets. These caps are easy to use - simply push them over the end of the tubing. They will fit square section tubing with any wall thickness as long as the external measurement is precisely 1" (25.5mm). The cap itself has a thickness of 4mm and requires a minimum of 16mm of tubing for proper installation.
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