According to key lock collar P/No. 7521S0297 issue that facing in GMB.
Firstly GMB request us to improved radius to R0.4Max, now GMB have additional request to increase hardness from 240-290HV to 35-45HRC minimum case depth 0.254mm on outer diameter.
Appendix R - Figure 78 - 40
So SNSS would like to request TSK to feasibility study how to make R0.4Max and hardness 35-45 HRC minimum case depth 0.254mm on outer diameter.
This is urgent issue for our customer so we would like to request to TSK come to SNSS to present your idea and discussion about tooling lead time and cost estimate on tomorrow 15:00.
Sorry for urgent request. If you have any query, please do not hesitate to contact to our SQA staff or reply this email back to us.