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About This Item

 

Full Description

BS EN 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.


Cross References:
ISO 273
ISO 898-1
ISO 898-2
ISO 965-2
ISO 16047:2005
ISO 68-1
ISO 261
ISO 262


All current amendments available at time of purchase are included with the purchase of this document.
 

Document History

  1. BS EN ISO 2320:2015

    👀currently
    viewing


    Fasteners. Prevailing torque steel nuts. Functional properties

    • Most Recent
  2. BS EN ISO 2320:2008


    Prevailing torque type steel nuts. Mechanical and performance properties

    • Historical Version
  3. BS EN ISO 2320:1998


    Prevailing torque type steel hexagon nuts. Mechanical and performance properties

    • Historical Version
  4. BS 4929-1:1973


    Specification for steel hexagon prevailing-torque type nuts. Metric series

    • Historical Version