... (T. C Bolt) For Metric Thread can meet Class 8.8, 10.9, 12.9 1, Elastic rail clips2, Dog spikes, square head screw ... : HDG, Zinc, Black... Carbon steel: Grade/class 4.8, 5.8, 8.8, 10.9, 12.9... Stainless steel: SS201, SS304, SS316... Hang zhou santiway international ... .. Inch. size: 25" max.Grade: Metric size: 4.8,5.8,6.8,8.8,10.9, A2,A4 Inch.size: Gr2, Gr5,Gr8, A307Surface: SELF ...