This standard specifies the characteristics of extra-large-series, product-grade-C plain washers in the 100 HV hardness class, of nominal sizes (nominal thread diameters) ranging from 5 mm to 36 mm inclusive.
These washers are suitable for:
— hexagon bolts and screws of product grade C in property classes up to and including 6.8;
— hexagon nuts of product grade C in property classes up to and including 6.
Used in timber structures.
If dimensions other than those listed in this International Standard are required, they should be selected from those given in GB/T 5286.
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. At the time of publication, the editions indicated
were valid. All normative documents are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents listed below.
