Button Head Sheet Metal Screws
This design is by far the best way to mount servos, cowls, landing gear, etc. The wide/low profile head 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