Anytime you replace the oil pan on your vehicle, it's wise to update the hardware, as well. Pioneer oil pan fasteners are made of durable steel and then zinc plated or coated to resist corrosion. The hex heads include integral lock washers to ensure the bolts or studs won't loosen through vibrations or nearby lubricant. These oil pan fasteners are machined to meet or exceed OE specifications for a large number of models from auto brands such as Chevy, Pontiac, GMC, Oldsmobile, Chrysler, Dodge, Ford, Mercury, and Plymouth.