GB/T 97.1-2002: Plain washers -- Product grade A

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Scope

This Standard specifies normal-series, product-grade-A plain washers in the
200 HV and 300 HV hardness classes and of nominal sizes (nominal thread
diameters) ranging from 1.6 mm to 64 mm inclusive.
Washers of hardness class 200 HV are suitable for
- hexagon bolts and screws of product grades A and B in property classes
up to and including 8.8;
- hexagon nuts of product grades A and B in property classes up to and
including 8;
- hexagon bolts, screws and nuts of stainless steel and of similar chemical
composition;
- case-hardened thread rolling screws.
Washers of hardness class 300 HV are suitable for
- hexagon bolts and screws of product grades A and B in property classes
up to and including 10.9;
- hexagon nuts of product grades A and B in property classes up to and
including 10.
If dimensions other than those listed in this Standard are required, they should
be selected from those given in GB/T 5286.
When soft material pieces are clamped, or large clearance holes in the
workpiece are used, the user should check the suitability of this type of washer.

Basic Data

Standard ID	GB/T 97.1-2002 (GB/T97.1-2002)
Description (Translated English)	Plain washers. Product grade A
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	J13
Classification of International Standard	21.060.30
Word Count Estimation	6,671
Date of Issue	2002-12-05
Date of Implementation	2003-06-01
Older Standard (superseded by this standard)	GB/T 97.1-1985
Quoted Standard	GB/T 90.1-2002; GB/T 90.2-2002; GB/T 1237-2000; GB/T 3098.6-2000; GB/T 3103.3-2000; GB/T 4340.1-1999; GB/T 5267.1-2002; GB/T 5267.2-2002; GB/T 5286-2001
Adopted Standard	ISO 7089-2000, MOD
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine of the People Republic of China
Summary	This standard specifies the flat washers. Nominal size (large diameter screw) is 1. 6 ~ 64mm, standard series, hardness rating is 200HV, 300HV, class A product.