good morning
http:alloyboltz.com sells stainless kits low grade at $50 and ARP at $150, i woud be very wary were i use ordinary stainless
as i clamped a 5/16 socket head in a vise and was able to wring the head of using a shortish allen key!
i've used ARP stainless and experienced the cold welding phenomenon, always use antiseize. one thing i've no experience of but jumps to mind Helicoils are i believe stainless but antiseize should prevent problems.
stuey
England