I've got a pair of inserts (new) with grease bolts £45 delivered Sent from my SM-G965F using Tapatalk
I believe they are mild steel. I'm getting more of these made up if you wanted a pair of stainless ones Sent from my SM-G965F using Tapatalk
again depend on which grade of ss you use, Renault have specify some 42CrMo4 steel with a high surface treatment by induction + chrome for durability which i'd like to keep as i do not want to change them too often. Are the thread fine pitch to fit with the current bolt. ( i am not bothered about grease nipple)