This part of GB/T 3098 specifies the mechanical and performance properties for prevailing torque type steel nuts when tested at an ambient temperature range of 10℃ to 35℃. It includes a single test to determine the prevailing torque properties (performance properties) and/or the torque/clamp force properties.
This part applies to prevailing torque all metal type nuts and prevailing torque non-metallic insert type nuts:
——With general purpose thread according to GB/T 192;
——With diameter/pitch combination according to GB/T 193;
——With coarse pitch thread M3 to M39 and mechanical properties according to GB/T 3098.2;
——With fine pitch thread M8×1 to M39×3 and mechanical properties according to GB/T 3098.4;
——Within the temperature range of -50℃ to +150℃ for prevailing torque all metal type nuts;
Note 1: See Clause 7, paragraph 3.
——Within the temperature range of -50℃ to +120℃ for prevailing torque non-metallic insert type nuts.
Note 2: See Clause 7, paragraph 4.
