This document specifies the characteris ics of elastic sheet metal nuts intended for use with fasteners with metric is external threads, with coarse pitch. The design of these nuts does not correspond to that of the quality class nuts defined in NF EN is 898-2, they are not intended for the production of screwed assemblies with prestressing. For conditions of use, see Article 6.
NF EN ISO 898-2 Fasteners - Mechanical characteristics of carbon steel and alloy steel fasteners - Part 2: nuts of specified quality classes*， 2022-10-26 Update