BH GSO ISO 7090:2016
Bahraini Standard
Current Edition
·
Approved on
08 February 2016
·
Plain washers, chamfered -- Normal series -- Product grade A
BH GSO ISO 7090:2016 Files
English
5 Pages
Current Edition
Reference Language
18.76 BHD
BH GSO ISO 7090:2016 Scope
This International Standard specifies the characteristics of normal-series, product-grade-A plain washers
chamfered at the outside diameter, in the 200 HV and 300 HV hardness classes and of nominal sizes (nominal
thread diameters) ranging from 5 mm to 64 mm inclusive.
Washers of hardness class 200 HV are suitable for
bolts and screws of product grades A and B in property classes up to and including 8.8;
nuts of product grades A and B in property classes up to and including 8;
bolts, screws and nuts of stainless steel of similar chemical composition;
case-hardened thread rolling screws.
Washers of hardness class 300 HV are suitable for
bolts and screws of product grades A and B in property classes up to and including 10.9;
nuts of product grades A and B in property classes up to and including 10.
If dimensions other than those listed in this International Standard are required, they should be selected from those
given in ISO 887.
When soft material pieces are clamped, or large clearance holes in the workpiece are used, the user should check
the technical suitability of this type of washer.
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