Introducing the ABBATRON / HH SMITH part 2161 Washers Flat Fiber. These high-quality washers are designed with a thickness of 1.57mm and an outer diameter ranging from 3.18mm to 6.35mm, making them compatible with a variety of applications. Specifically made for use with 4 screw sizes, these fiber washers provide a reliable and durable solution for your fastening needs. Trust ABBATRON / HH SMITH for top-notch quality and performance in every project.