These wheel lug studs are made of carbon steel and tested to demanding automotive industry standards to ensure strength, longevity and safety. This part is compatible with the following vehicles. Before purchasing, enter your vehicle trim in the garage tool to confirm fitment. [Chevrolet C20 Pickup: 1973, 1974] - [Chevrolet C20 Suburban: 1974, 1975, 1976, 1977, 1978, 1979, 1980, 1981] - [Chevrolet C20: 1975, 1976, 1977, 1978, 1979, 1980, 1981] - [Chevrolet G30 Van: 1971, 1974] - [Chevrolet G30: 1975, 1976, 1977, 1978, 1979, 1980] - [Chevrolet K20 Pickup: 1974] - [Chevrolet K20 Suburban: 1974, 1975, 1976, 1977, 1978, 1979, 1980, 1981] - [Chevrolet K20: 1975, 1976, 1977, 1978, 1979, 1980, 1981] - [Chevrolet P20 Van: 1972] - [Chevrolet P20: 1975, 1976, 1977, 1978, 1979, 1980] - [Chevrolet P30 Van: 1971] - [GMC C25 Suburban: 1975, 1976, 1977, 1978] - [GMC C25/C2500 Pickup: 1974] - [GMC C25/C2500 Suburban: 1974] - [GMC C25: 1975, 1976, 1977, 1978] - [GMC C2500 Suburban: 1979, 1980, 1981] - [GMC C2500: 1979, 1980, 1981] - [GMC G35/G3500 Van: 1971, 1974] - [GMC G35: 1975, 1976, 1977, 1978] - [GMC G3500: 1979, 1980] - [GMC K25 Suburban: 1975, 1976, 1977, 1978] - [GMC K25/K2500 Pickup: 1974] - [GMC K25/K2500 Suburban: 1974] - [GMC K25: 1975, 1976, 1977, 1978] - [GMC K2500 Suburban: 1979, 1980, 1981] - [GMC K2500: 1979, 1980, 1981] - [GMC P25/P2500 Van: 1971, 1972, 1973, 1974] - [GMC P25: 1975, 1976, 1977, 1978] - [GMC P2500: 1979, 1980] - [GMC P35/P3500 Van: 1971]