Flat Washers BS 4320/Table 3 Mild Steel

Flat Washers BS 4320/Table 3 Mild Steel

  • Specification – BS 3410
  • Material – Mild Steel
  • Grade – Mild Steel


Washer, a part of the machine that is used in combination with a screw fastener, such as a bolt and nut, which usually serves either to prevent the screw from loosening or to spread the load from the nut or bolt head over a larger area. Thin flat soft steel rings are commonly used for load distribution. Washers serve as springs to compensate for any change in the distance between the head of the bolt and the nut.

Mild Steel GRADE
BOLT DIA. (D) INSIDE DIA. (D) OUTSIDE DIA.(D)  Thickness (T) Self Colour Galvanised PTFE Coated Blue Zinc Plated
M10 11.0 21.0 21.0
M12 14.0 24.0 24.0
M14 16.0 28.0 28.0
M16 18.0 30.0 30.0
M18 20.0 34.0 34.0
M20 22.0 37.0 37.0
M22 24.0 39.0 39.0
M24 26.0 44.0 44.0
M27 30.0 50.0 50.0
M30 33.0 56.0 56.0
M33 36.0 60.0 60.0
M36 39.0 66.0 66.0

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