BS EN ISO 3506-7:2025 PDF

Fasteners — Mechanical properties of corrosion-resistant stainless steel fasteners - Flat washers with specified grades and property classes

First page of standard BS EN ISO 3506-7:2025

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Title (English):

BS EN ISO 3506-7:2025

Fasteners — Mechanical properties of corrosion-resistant stainless steel fasteners - Flat washers with specified grades and property classes

Document status:: Active
Format:: Electronic (PDF)
Publication date:: December 31, 2025
ICS:: 21.060.30
Technical committee:: CEN
SKU:: BS EN ISO 3506-7:2025

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Abstract

1 Scope This document specifies the mechanical and physical properties of flat washers made of corrosion resistant austenitic, ferritic and duplex stainless steels, designed to be used in bolted joints in combination with bolts, screws, studs and nuts with specified grades and property classes in accordance with ISO 3506‑1 and ISO 3506‑2 . These types of washers are also used with other stainless steel fasteners such as screws forming their own mating thread (see e.g. ISO 3506‑4 ). ISO 3506‑6 provides general rules and additional technical information on suitable stainless steels and their properties (detailed properties of stainless steel grades, corrosion behaviour with regards to pitting, crevice and intergranular corrosion, magnetic properties, etc.) WARNING — Washers conforming to the requirements of this document are tested at the ambient temperature range of 10 °C to 35 °C and are used in applications ranging from –20 °C to +150 °C. However, these washers are also used outside this range down to –196 °C and up to +300 °C for specific applications. It is possible that they do not retain the specified mechanical and physical properties at lower and/or elevated temperatures. Therefore, it is...

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BS EN ISO 3506-7:2025 PDF

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