Four Pack M8 Threaded Inserts For One And A Half Inch Square Tube Black Plastic Plug Caster Inserts For Chair End Caps And Furniture Leg Plugs With Inner Height Fifteen Millimeters And Outer Height Twenty Millimeters

M8 Threaded Inserts for 1.5in Square Tubes - 4 Pack
✔️ M8x1.25 thread, fits 38x38mm square tube, 4 pcs

These black plastic threaded inserts slide into 1.5 inch square tubing to accept M8 screws, letting you add casters or leveling feet to furniture and equipment. They're ideal for chair frames, workbenches, TV stands, racks, and shelves that use square tubes.

✅ Thread size: M8x1.25
✅ Outer size: 38x38mm (1.5x1.5 in)
✅ Inner height: 15mm (0.59 in)
✅ Overall height: 20mm (0.79 in)

💡 What is a handy way to use threaded inserts on 1.5 inch square tubes for furniture projects?

- Install in hollow square tubes to provide screw-in access for casters or feet
- Use with M8 hardware to attach legs, wheels, or leveling pads
- Great for shop-built desks, workbenches, racks, and home furniture projects