This document specifies mechanical and physical properties of flat washers, designed to be used in bolted joints in combination with bolts, screws, studs and nuts with a specified property class in accordance with ISO 898‑1 and ISO 898‑2.
This document is applicable to the following flat captive and non-captive washers made of carbon steel or alloy steel, with thickness from 0,2 mm to 12 mm:
- plain washers (with or without knurls, ribs or chamfers);
- square washers;
- square hole washers;
- shaped plates.
It does not specify requirements for the following properties:
- corrosion resistance;
- weldability.