NF EN ISO 4035, E25-405-1 (09/2023)

This document specifies the characteristics of hexagonal low nuts (style 0), in steel and stainless steel, with metric coarse thread M1.6 to M64, and grades A and B. Low nuts used as lock nuts are to be assembled with a normal nut or a high nut. WARNING Low nuts (style 0) have a reduced load capacity compared to normal or high nuts, and are not designed to provide resistance to thread pullout (see ISO 898-2). If in some cases other specifications are required, stainless steel grades and quality classes can be chosen from ISO 3506-2.
(Automatic translation from French)