If your vehicle is more than 5 years old, chances are you'll need new spring eye bolts when you work with your leaf springs. This is because over time they rust and become impossible to re-use. However, finding replacements can be difficult at best. Once again, Jack-it has put together complete kits to solve your problem. These bolts are fine thread, grade 8, the nuts are serrated self locking nuts, and the kits also include 2 flat washers per bolt.