Good luck with the temper on the 18-8 because it's on the low end of any significant heat treatment, if at all. You can work harden it but any heat will zero that out. If you want to temper step into the 403, 410, 416, 420 series.Thanks Randy , Rustrp.
I need the Id to be closer than .125 the thread major is .111 , .125 would be loose for this application
I ordered 100 18-8 SS washers with an Id of .112 from bolt depot ,hoping I can form the cone, turn the od , temper . 100 pcs $1.90 shipping $4.00