... :Metric standerd: Grade4.6, Grade4.8, Grade5.6, Grade5.8,Grade 8.6,Grade8.8,Grade10.9,Grade 12.9Inch standard: ... :Metric,size from 4mm-72mm,lnch size from 1/8-2-1/24. Length:0-300mm5. Surface treatment: ... & nutSize1/4,5/16,3/8,M6,M8,M10 seriesClass4.8,6.8,8.8,etc.Grade2,5,8,10,etc.MaterialLow carbon steel, ... 58.8eA7.668.7911.0514.3818.921.124.49B-8.6310.8914.218.7220.8823.91S781013171922L8-408-408-5012 ...