So Why is ISO965 so important ??
ISO965 is the international standard for ISO Metric threads (M6, M12, M8 Fine etc)
ISO965 Compliance Guarantees 2 critical parameters.
A compliant bolt will actually screw into a compliant female thread (Pretty Obvious)
A compliant Nut and Bolt will have a guaranteed minimum thread contact depth
This 2nd specification is less obvious but absolutely crucial to guarantee thread attachment strength !!
Unfortunately thread depth is rarely understood or tested by the majority of offshore manufacturers.
Austral Tools specify and insist on Rivnut Threads that are QA assured to ISO965 Thread depth.