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They are defined by their outside diameter (OD) and thickness.

Applicable Standard

Form A & B DIN 125, Form C & D BS 4320.

Material

  • A2 Stainless Steel (304)
  • A4 Stainless Steel (316)

Sizes

M5–M39.

Specific Features

  • Form A washers: Normal diameter, normal thickness
  • Form B washers: Normal diameter, light thickness
  • Form C washers: Large diameter, normal thickness
  • Form D washers: Large diameter, light thickness

Performance

Corrosion-resistant, flat washers prevent surface damage, and reduce loosening.

Typical Applications

Used in engineering, construction, and marine environments to distribute fastener loads.

Installation Notes

  • Installed under the nut or bolt head
  • Anti-galling measures recommended when used with stainless steel fasteners

Dimensions & Design

Stainless Steel Washers are defined by their outside diameter (OD) and thickness

Product Form A - Outside Dia.Form A - ThicknessForm B - Outside Dia.Form B - ThicknessForm C - Outside Dia.Form C - ThicknessForm D - Outside Dia.Form D - Thickness
M5 10.0 1.0 12.5 0.8 12.5 1.0 - -
M6 12.5 1.6 12.5 0.8 14 1.6 14 0.8
M8 17 1.6 17 1.0 21 1.6 21 1.0
M10 21 2.0 21 1.25 24 2.0 24 1.25
M12 24 2.5 24 1.6 28 2.5 28 1.6
M14 28 2.5 28 1.6 30 2.5 30 1.6
M16 30 3.0 30 2.0 34 3.0 34 2.0
M18 34 3.0 34 2.0 37 3.0 37 2.0
M20 37 3.0 37 2.0 39 3.0 39 2.0
M22 39 3.0 39 2.0 - - - -
M24 44 4.0 44 2.5 50 4.0 50 2.5
M27 50 4.0 50 2.5 - - - -
M30 56 4.0 56 2.5 - - - -
M33 60 5.0 60 3.0 - - - -
M36 66 5.0 66 3.0 - - - -
M39 72 6.0 72 3.0 - - - -

View our Stainless Steel Washers datasheet

(PDF, 1.22 MB)