Square plate washers are made from low carbon steel and have a larger surface area than round washers. Since they develop more friction when tightened against wood, this type of washer is specified for seismic applications. They are often found in timber construction.
Stainless Steel
Square Washer (a) 30MM x 30MM 32MM X 32MM 38MM X 38MNM 50MM X 50MM 65M X 65MM 75MM X 75MM 75MM X 75MM Hole Diameter (d) 9MM - 14MM 9MM - 14MM 11MM - 18MM 13MM - 22MM 65M X 65MM 75MM X 75MM 17MM - 26MM Thickness 3.0MM 3.0MM 3.0MM 3.0MM 4.5MM 4.5MM 6.0MM Weight 20 grm 24 grm 35 grm 3.0MM 140 grm 180 grm 240 grm
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