OS GSO ISO 7091:2013
ISO 7091:2000
Omani Standard
Current Edition
·
Approved on
01 April 2013
Plain washers -- Normal series -- Product grade C
OS GSO ISO 7091:2013 Files
English
4 Pages
Current Edition
Reference Language
20.87 OMR
OS GSO ISO 7091:2013 Scope
This International Standard specifies the characteristics of normal-series, product-grade-C plain washers in the
100 HV hardness class and of nominal sizes (nominal thread diameters) ranging from 1,6 mm to 64 mm inclusive.
Washers of hardness class 100 HV 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;
case-hardened thread rolling screws.
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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