60.60 Standard published Nov 26, 2025
CEN
CEN/TC 185 Fasteners
European Norm
21.060.30 Washers, locking elements
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
PUBLISHED
EN ISO 3506-7:2025
60.60
Standard published
Nov 26, 2025