British Standards Institution

Source:: ISO
Committee:: FME/9 - Fasteners
Categories:: Information management | Standardization. General rules | Engineering | Mechanical systems and components | Fasteners | Bolts, screws, studs | Nuts | Washers, locking elements

Scope

This document specifies grades and mechanical and physical properties of flat washers made of austenitic, ferritic and duplex steel grades, designed to be used in bolted joints in combination with bolts, screws, studs and nuts with a specified property class in accordance with ISO 3506-1 and ISO 3506-2.

These types of washers may also be used with other fasteners such as screws forming their own mating thread

This part of ISO 3506 is applicable to the following flat captive and non captive washers made of corrosion-resistant stainless steel:

— plain washers (with or without knurls, ribs or chamfers);

— square washers;

— square hole washers;

— shaped plates.

Purpose

This International Standard is proposed as an addition to the ISO 3506 series to provide a single point of reference for flat washers, in order to standardize market expectations for users, distributors and manufacturers.

This International Standard deals only with flat washers made of corrosion-resistant stainless steel. Washers made of carbon steel and alloy steel are addressed in ISO 898-3 due to their different characteristics and test methods.

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Please email further comments to: debbie.stead@bsigroup.com

Standard timeline

1. Proposal

Proposal start date:

14/07/2021

Proposal end date:

05/09/2021

2. Draft

3. Public Comments

4. Comment Resolution

5. Approval

6. Publication

Learn more about the standards development process

Standards Development

ISO/TC 2 N 1735, ISO/PWI 3506-7 Fasteners -- Mechanical properties of corrosion-resistant stainless-steel fasteners -- Part 7: Flat washers with specified grades and property class

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