The components in this leaf spring axle U-bolt kit are designed to securely hold the leaf spring or leaf spring bundle to the underside of an axle of a vehicle or trailer. Check the leaf spring dimensions and other relevant application details to select the right type and size U-bolt kit for your needs. This part is compatible with the following vehicles. Before purchasing, enter your vehicle trim in the garage tool to confirm fitment. [Ford F-250: 1973, 1974, 1975, 1976, 1977, 1978, 1979] - [Ford F-350: 1973, 1974, 1975, 1976, 1977, 1978, 1979]