扣件.普通转矩钢螺母(ISO 2320:2015)

[中文适用范围]： 本国际标准规定了在 +10 °C 至 +35 °C 环境温度范围内测试时常用扭矩型螺母的功能特性。 它包含用于同时测定夹紧扭矩特性和扭矩/夹紧力特性的组合测试方法。 它适用于全金属通用扭矩型螺母和符合ISO 68-1的带非金属嵌件、ISO螺纹牙形的通用扭矩型螺母；直径/螺距组合符合 ISO 261 和 ISO 262；标准螺纹M5至M39或细牙螺纹M8×1至M39×3；螺纹公差符合 ISO 965-2；机械性能符合 ISO 898-2 标准。 本标准规定的夹紧扭矩值基于实验室测试条件。 注 1：实际夹紧扭矩在实际应用中可能会有所不同。 注2：符合本国际标准要求的全金属螺母用于-50℃至+150℃温度范围内的应用。 注3：符合本国际标准要求的带非金属嵌件的螺母用于-50℃至+120℃温度范围内的应用。 警告 - 超出环境温度范围的温度可能会影响功能特性（扭矩/预载和夹紧扭矩特性）。 [外文原描述]： ISO 2320:2015 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 × 1 to M39 × 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 1 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 +120 °C. WARNING ? Temperatures outside the ambient temperature range can influence the functional properties (torque/clamp force and prevailing torque properties), see Annex A.