1 Scope
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.
GB/T 90.1-2002 Fasteners — Acceptance Inspection (idt 3269:2000)
GB/T 90.2-2002 Fasteners — Marking and Packaging
GB/T 1237-2000 Designation System for Fasteners (eqv ISO 8991:1986)
GB/T 3103.3-2000 Tolerance for Fasteners — Plain Washers (idt ISO 4759-3:2000)
GB/T 4340.1-1999 Metallic Materials — Vickers Hardness Test — Part 1: Test Method (eqv ISO 6507-1:1997)
GB/T 5267.1 Fasteners — Electroplated Coatings (ISO 4042:1999, IDT)
GB/T 5267.2 Fasteners — Non-electrolytically Applied Zinc Flake Coatings (ISO 10683:2000, IDT)
GB/T 5286 Plain Washers for Bolts, Screws and Nuts — General Plan (idt ISO 887:2000)
3 Dimensions
Foreword II
1 Scope
2 Normative References
3 Dimensions
4 Specifications and Standards of Reference
5 Designation
