Metric Flat Washers, Per DIN 125A Dimensions & Specifications

 Metric Standard Flat Washers Drawing

METRIC - Standard Flat Washers, Per DIN 125A

Nominal Size

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Internal Diameter (ID)

Outside Diameter (OD)

Thickness (TH)
Max Min Max Min Max Min
3 3.38 3.2  7  6.64 0.55 0.45 
3.5 3.88 3.7   8   7.64 0.55 0.45 
4 4.48 4.3  9  8.64 0.9 0.7 
5 5.48 5.3   10   9.64 1.1 0.9 
6 6.62 6.4  12  11.57 1.8 1.4 
8 8.62 8.4  16  15.57  1.8 1.4 
10 10.77 10.5  20 19.48 2.2 1.8 
12 13.27 13 24 23.48 2.7 2.3 
16 17.27 17 30 29.48 3.3 2.7 
20 21.33 21 37 36.38 3.3 2.7 

 

Description

A thin, flat circular part with a central hole about twice the nominal thread diameter of the bolt or screw to be used with it.
The 125A "A" refers to this washer not being chamfered.
Applications/
Advantages

This flat washer is the most commonly used with low carbon bolts, screws and nuts.

Material

Steel HV-140

Hardness

 HV 140 - 250
Plating For info. on plating flat washers, see above.