5/16 in. Black Exterior Split Lock Washers (50-Pack)

Engineered to provide more uniform load distribution, split lock washers are great for any indoor/outdoor project. Ideal for situations where potential loosening from corrosion or vibration is a concern, split lock washers are used to prevent nuts and bolts from coming loose. These fasteners contain split ends that help lock into the mating material, thus providing a locking feature when tightened beneath a nut. The black ceramic finish offers superior corrosion resistance while conforming to the latest trends in hardware. Parts measure 5/16 in. Dia. Use with treated lumber in applications with like nuts and bolts of similar diameter.|Designed for applications using a bolt or a screw where 2-pieces are being joined together|Black ceramic finish combines superior corrosion resistance with modern aesthetics|Install with like nuts and bolts of similar diameter|For use with any indoor or outdoor project with treated lumber|Split ends grip the material surface to prevent loosening during vibration|Parts carry a limited lifetime warranty