... - 2)Physical performance:a) class 2, made from low carbon steel, C1008, C1010, Q195 etcb) class 5, class 8, made ... C1035, C1045, etc, And with hardened treatment.c) stainless steel SS304 SS316.-3)Surface treatment:plain/self colour, zinc plated ... .851930M335055.372233M365560.792536M396066.442739M426572.092942M457076.953245M487582.63648-c) American Standard nylon insert lock nuts. NE patten 4#~ 1 1/2, ...