Conquest Grade 8 flange bolts are made from strong alloy steel and are designed with a flange under the head that distributes the load, similar to a washer. This design eliminates the need for extra lock nuts or washers. These SAE J429 certified flange fasteners, also known as frame bolts, are built to handle heavy loads in industrial settings where metal-to-metal connections are needed. Grade 8 bolts with fine threading are offered in a black phosphate & oil finish, and a zinc yellow finish. Coarse threaded hex flange bolts are also available.