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