The Hillman Group 830670 Stainless Steel 3/8-Inch Split Lock Washer, (100 x 1 Pack) Size: 3/8 inch Split Lock Washer; Finish: Stainless Steel The split lock washer provides a more uniform load distribution These fasteners resist loosening caused by vibration and corrosion Used in applications with like nuts and bolts of similar diameter as well as screw products