This standard specifies the tolerances for punched plain washers of product grades A and C, for use with bolts, screws and nuts of nominal thread diameters of from 1 mm to 150 mm inclusive.
It is recommended that these tolerances also be used for non-standard washers.
Note: The product grade refers to the quality of the product and to the size of the tolerances.
Appendix A (informative) presents tolerances taken from GB/T 1800.2 and GB/T 1800.4.
2 Normative References
The following standards contain provisions which, through reference in this text, constitute provisions of this standard. At the time of publication, the editions indicated were valid. All standards 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 standards indicated below.
GB/T 1182-1996 Geometrical tolerancing — Generalities, definitions, symbols, indications on drawings (eqv ISO 1101:1983)
GB/T 1800.2-1998 Limits and fits — Bases — Part 2: Basic rules of tolerances, deviations and fits (eqv ISO 286-1:1988)
GB/T 1800.4-1999 Limits and fits — Tables of standard tolerance grades and limit deviations for holes and shafts (eqv ISO 286-2:1996)
GB/T 5267-1985 Electroplated coatings on threaded fasteners
GB/T 3103.3-2000 The following standards are cited：
