UNE-EN ISO 10511:2026

This document specifies the characteristics of prevailing torque hexagon thin nuts (with non metallic insert),

in steel and stainless steel, with metric coarse pitch thread M3 to M39, and with product grades A and B.

NOTE These nuts are designed with an overall height equal to mmin (as specified in ISO 898-2 and ISO 4035

for style 0) plus the prevailing torque feature. The height of the prevailing torque feature (hmax mmin) for the nonmetallic

insert is identical for regular, high and thin nuts for a given diameter.

Nuts with sizes D < M5 and design principles in accordance with style 0 are specified in Annex A.

Thin nuts used as jam nuts are to be assembled together with a regular or high nut.

WARNING Thin nuts (style 0) have a reduced loadability compared to regular or high nuts, they

are not designed to provide resistance to thread stripping (see ISO 898-2).

If in certain cases other specifications are requested, stainless steel grades and property classes can be

selected from ISO 3506-2.