Overview

Metric washers - Form C

BS 4320 C  

Materials and Finishes:  

Steel/Zinc & clear 

Stainless steel/Self colour

Note: Due to the fact that fastening applications differ greatly, the below information is for guidance only and is correct to the best of our knowledge. The customer must satisfy themselves with the performance of the fastener and validity of the data. TR Fastenings will not be held responsible for any failure that may occur from the use of this information.

Dimension data
For metric screwsd nomD noms nom
M4*4.310.00.8
M55.312.51.0
M66.4141.6
M88.4211.6
M1010.5242.0
M1213.0282.5
M14*15.0302.5
M1617343
M18*19373
M20*21393
M22*23443
M24*25504
M27*28564
M30*31604
M33*34665
M36*37725

* - Non preferred

Preferred range
Preferred Range
ThreadMaterial
M4ST  A2
M5ST  A2
M6ST  A2
M8ST  A2
M10ST  A2
M12ST  A2
M16ST  A2
M20ST  A2
M24A2  A4

ST - Steel, Self colour / Zinc and Clear

A2 - A2 Stainless Steel, Self colour

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