Coupling Lock Nuts | M6-M12 Zinc-Plated | Three-Hole Furniture Connector

This set of zinc-plated flange coupling nuts provides a robust and vibration-resistant locking solution for furniture assembly. The integrated three-hole flange design distributes load and prevents ro...
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Questions about this product
- What are these three-hole coupling nuts for?
- They join furniture and frame components with a locking, vibration-resistant connection. The flange spreads the clamping load and the three holes let you screw it down so it won't spin loose. Good for desks, racks, and workbench joints.
- How do the three flange holes get fixed down?
- The flange has a three-hole mounting pattern, with holes around 4 to 5.5mm. You run screws through them into the panel or frame to lock the nut in place. That stops rotation and keeps the joint tight under vibration.
- Will these nuts hold up against rust and loosening?
- They're carbon steel with zinc plating around 5 to 8 microns, which resists rust in normal indoor use. The flange and locking feature fight loosening from vibration. For outdoor or playground use, keep an eye on the coating over time.
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