We supplied our long time medical device customer 2,500 pieces of these tricky custom stainless slotted pins.  Production was done domestically using 416 stainless steel material - the original design called out for 17-4PH stainless steel material but that was found to be unnecessary for the relatively simple application.  416 SS provided a much more cost effective and faster alternative while still providing the "spring" action required when the four petals were contracted.  10 pieces were provided out of the production batch for testing and approval before the balance was completed with the slotting process.