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| SYSTEM | SIZE | LENGTH | GRADE | FINISH | SPECIFICATION | 
| METRIC | M5-M48 | 10-300mm | Class 4.8 , 5.8, 8.8, 10.9, 12.9 |      PLAIN | DIN931  DIN933 | 
| INCH | 1/4"—2" | 5/16"-12" |      SAE J429--Grade 2,5,8 | ||
| ASME B18.2.1 | 
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