If you have been turning wrenches for a few years, you have probably developed a sense for what 20-50 ft-lbs of torque feels ...

Grade 2 bolts are made of low-carbon steel and are usually zinc plated (silver in color). There are no markings on the head of a Grade 2 bolt (more on this later).

A US Grade 1 or 2 fastener—your basic hardware store peanut butter bolt—should never be used on a motor vehicle in the interest of safety. US Grade 1 and 2 fasteners are low to medium carbon ...