Flat washers are used to protect surfaces by evenly distributing torque when a bolt or screw is tightened. A washer is a thin plate with a concentric hole that's typically used to evenly distribute the load of a threaded fastener.
Aluminum, Brass, Nylon, Silicon Bronze, Stainless steel
For Screw
Nominal Size
Hole Diameter Outside Diameter Washer Thickness M1.6 1.7 4 0.3 M2 2.2 5 0.3 M2.5 2.7 6 0.5 M2.6 2.8 7 0.5 M3 3.2 7 0.5 M3.5 3.7 8 0.5 M4 4.3 9 0.8 M5 5.3 10 1 M6 6.4 12 1.6 M7 7.4 14 1.6 M8 8.4 16 1.6 M10 10.5 20 2 M12 13 24 2.5 M14 15 28 2.5 M16 17 30 3 M18 19 34 3 M20 21 37 3 M22 23 39 3 M24 25 44 4 M27 28 50 4 M30 31 56 4 M33 34 60 5 M36 37 66 5 M39 40 72 6 M42 43 78 7 M45 46 85 7 M48 50 92 8 M52 54 98 8 M56 58 105 9
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