Metric Hardware Specification Charts and Tables Metric bolts, Metric washers, Metric screws.

Helical Coil Threaded Insert Install Torque per. ASME B18.29.2M Metric

Maximum Locking Torque: Maximum locking torque shall be the highest torque value encountered on any installation or removal cycle and shall not exceed the values specified in Table calculator. Maximum locking torque readings shall be taken on the first and seventh installation cycles before the assembly torque is applied and on the 15th removal cycle.

Minimum Breakaway Torque: Minimum breakaway torque shall be the torque required to overcome static friction when 100% of the locking feature is engaged and the bolt or screw is not seated (no axial load). It shall be recorded at the start of the 15th removal cycle. The torque value for any cycle shall be not less than the applicable value shown in table calculator.

Acceptance: The inserts shall be considered to have failed if, at the completion of any of the tests and inspection, any of the following conditions exist:

a) any break or crack in the insert
b) installation or removal torque exceeds the maximum locking torque value in Table 5
c) breakaway torque less than the values in Table 5
d) movement of the insert beyond 90° relative to the top surface when installing or removing the test bolt
e) seizure or galling of the insert or test bolt
f) tang not broken off, which interferes with the test bolt at installation
g) tang breaks off during insert installation

Reference

ASME B18.29.2M - 2005 (R2017), Helical Coil Screw Thread Inserts: Free Running and Screw Locking (Metric Series)