Dorman 879-007 Split Lock Washer - Class 8, M7 Size - Hardened Steel Lock Washer For Automotive & Mechanical Applications - Easy To Install, No Special Tools

About This Product

Need a reliable lock washer that won’t loosen up over time? This Dorman 879-007 Split Lock Washer is a Class 8, M7 size washer made from hardened steel to keep bolts tight and secure in high-vibration applications. Whether you’re working on a car, truck, machinery, or any piece of equipment that deals with shakes and movement, this washer helps prevent nuts from backing off. It’s a direct replacement for OEM parts, so you can trust it to fit right and perform like the original. Installation is a breeze—no special tools needed. Just slide it onto the bolt before the nut, tighten down, and you’re done. Dorman has been making automotive and hardware solutions since 1918, so they know a thing or two about durability. This washer is quality-tested to ensure proper fit and long service life, and the hardened steel construction means it can handle tough conditions without deforming. Keep a few in your toolbox for repairs, maintenance, or DIY projects. It’s a small part, but it makes a big difference in keeping things safely fastened. Perfect for exhaust hangers, suspension components, engine parts, and more. Trustworthy, affordable, and built to last.