Rectangular tube cap 20x40x1.5mm

thingiverse

This is a versatile rectangular cap designed to secure steel tubes measuring 40x20x1.5mm in size. I successfully employed these caps as the foundation for the legs of a sturdy bench, where they fit snugly into place - requiring a gentle tap from a hammer to ensure a secure seal. The caps remained firmly attached even after I gave the entire bench a fresh coat of paint.