EXACT FACTORY SPECIFICATIONS: Includes 20 Pcs Bulge Acorn Style Lug Nuts with 7/16"-20 Threads｜ 35mm 1.38" Long｜ 3/4" 19mm Hex｜ 60 Degree Conical Seat｜ True One-Piece Carbon Steel Construction with Black Finish PRECISION FITMENT ENGINEERED FOR AFTERMARKET WHEELS. Compatible on vehicles with 7/16"-20 threads as found on Buick Regal 1973-81 ｜ LeSabre 1982-85 ｜ Cadillac Seville 1977-85 ｜ Chevrolet Bel Air 1959-81 ｜ Camaro 1967-81 ｜ Chevelle 1964-72 ｜ Corvette 1953-82 ｜ Impala 1959-85 ｜ Malibu 1976-81 ｜ Monte Carlo 1970-81 ｜ Nova 1975-79 ｜ Vega 1971-77 ｜ Oldsmobile, Cutlass 1985-87 ｜ Cutlass Supreme 1978-89 ｜ Pontiac Firebird 1967-82 ｜ Grand Am 1973-74 ｜ Grand Prix 1977-87 ｜ GTO 1964-67 ｜ LeMans 1975-77 Confirm capatability with AMAZON CONFIRM FIT. FOR AFTERMARKET WHEELS Only DESIGNED & TESTED IN USA: 3/4" 19mm Hex Bulge Acorn Lug Nuts are specifically designed for aftermarket wheels. One-Piece design ensures reliable clamping force and long‑term durability under daily driving conditions. RELIABLE PERFORMANCE & CORROSION RESISTANCE: Premium multi‑layer Black coating tested for 48‑hour salt‑spray corrosion protection. Ideal upgrade for your vehicle. Designed for Sunny Climate and AFTERMARKET wheels. Cold Forged carbon Steel. High quality Precise 7/16"-20 threads. Built to SAE Standards COMPLETE 20 Pcs SET: Full lug nuts set for four wheels Black Lug Nuts with 60 Degree Conical Seat ready for direct installation. Upgrade now to your vehicles appearance and the safety you are looking for. Wheel Accessories Parts 20 Pcs 7/16"-20 Thread Bulge Acorn 35mm 1.38" Long Lug Nuts Black 3/4" 19mm Hex Fits Many Classic Chevrolet, Buick, GMC, Pontiac Vehicles