ISO 2320-2015 pdf free.Fasteners一Prevailling torque steel nuts – Functional properties. ISO 2320 specifies the functional properties for prevailing torque steel nuts when tested at an ambient temperature range of +10 °C to +35 °C. It includes a combined test method to determine the prevailing torque properties and the torque/clamp force properties at the same time. It applies to prevailing torque all metal type nuts and prevailing torque non-metallic insert type nuts: — with triangular ISO thread in accordance with ISO 68-1; — with diameter/pitch combination in accordance with ISO 261 and ISO 262; — with coarse pitch thread M5 to M39 or with fine pitch thread M8 x ito M39 x 3; — with thread tolerances in accordance with ISO 965-2; — with mechanical properties in accordance with ISO 898-2; Prevailing torque values specified in this standard are based on laboratory test conditions. NOTE I Actual prevailing torques in practical application can vary. NOTE 2 All metal type nuts conforming to the requirements of this International Standard are used in applications ranging from -50°C to +150 °C. NOTE 3 Non-metallic insert type nuts conforming to the requirements of this International Standard are used In applications ranging from -50 °C to…