The wide/low profilehead of the screw acts as a washer and they also have a socket head for easy, no slip installation. Bright Zinc plated with clear chromate.
These also have unlimited uses in areas outside the hobby such as household, crafts, garage, vehicles, farm, agricultural, woodworking and many more. 8/pkg
Used with permission, copyright 2019 Dubro RC. Copyright 2019 Brey Corp. t/a Hobby Works.