AccuWheel LNA-12000Z5O Zinc Finish Open-End Bulge Acorn Wheel Lug Nuts (1/2"-20 Thread Size) 0.83" Tall - Pack of 20 Lugnuts Acorn Bulge Design, provides greater seating surface to prevent damage during installation. Cold Forged Carbon Steel then heat treated for enhanced Rigidity and exceptional strength. Zinc Plated Finish with Open End Bulge Acorn Design, Perfect for Custom Wheels with a big Center Cap on it. Open-end Acorn Bulge Design, Hex: 3/4"; Height: 0.84"; Weight: 1.3oz each. Lug Nut Kits include 20 of Zinc Finish 1/2"-20 Bulge Acorn nuts. Please check Product Description for Vehicle Fitments