DS/EN ISO 2320:2008

Prevailing torque type steel nuts - Mechanical and performance properties

This European standard specifies the test method which allows to determine with a single test the torque/clamp force properties and/or the prevailing torque properties (performance properties) for prevailing torque type steel nuts when tested at an ambient*temperature range of + 10 C to + 35 C.*It applies to prevailing torque all metal type nuts and prevailing torque non-metallic insert type nuts*- with triangular ISO thread according to ISO 68;*- with diameter/pitch combination according to ISO 261 and ISO 262;*- with thread tolerance 6H according to ISO 965-2, except for the prevailing torque feature;*- with coarse pitch thread M3 to M39 and mechanical properties according to ISO 898-2;*- with fine pitch thread M8 ├- 1 to M39 ├- 3 and mechanical properties according to ISO 898-6;*- within the temperature range of -50 C to + 150 C for all metal type nuts;*- within the temperature range of -50 C to + 120 C for nuts with non-metallic insert.