Triple Rib Nylon Plastic Wall Plug Anti-Rotation Multi-Line Grip Expansion Anchor for Solid Wall Concrete Fixing Product Description The Triple Rib Nylon Plastic Wall Plug is engineered with three longitudinal anti-rotation ribs along the plug barrel that mechanically interlock with the borehole wall to prevent spinning during screw driving and throughout the service life of the fixture. The multi-rib geometry dramatically increases surface friction contact area compared to