Black Ruspert Flat Washersbuy on amazon
1/2", 1/4", 3/8", 5/16"
Flat washers are used with a bolt or screw to distribute the load evenly. They also protect the surface underneath when tightening a bolt or screw. These are made strictly to the Society of Automotive Engineers (SAE) specifications from low carbon steel with a black ruspert coating rated for outdoor applications.