hey guys.. I am trying to find some replacements for my o2 housing bolts and found some that will fit from a local fastener place. They said the metal is a 10 point something hardness and grade 8 ... I know this has to do with stress and heat resistance so is this any good? Will it be able to take the heat of my turbo? The dealer wants like 7 bucks per bolt while this place wants .84 per bolt.. just want to make sure they will be able to take it.

Found out the bolt size is 10x31 with 1.25 pitch from dealer.. best bet is to find a 10x30 with 1.25 pitch as a replacement cause most dont make 10x31