https://www.tractorsupply.com/tsc/product/hillman-class-8-metric-flat-washer-m8-diameter
Hillman M8 Zinc-Plated Metric Flat Washers, 10-Pack at Tractor Supply Co
These Hillman M8 Zinc-Plated Metric Flat Washers are great for adding resistance to your bolts and screws to prevent them from boring into the wood and...
metric flat washers
https://www.homedepot.ca/product/paulin-m10-metric-flat-washers-zinc-plated-iso-7089/1000128559
Paulin M10 Metric Flat Washers - Zinc Plated - ISO 7089 | The Home Depot Canada
Made from medium carbon steel, tempered and zinc plated. Best for areas where high strength is desired. Similar in strength to SAE Grade 5.
metric flat washers