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Class 8.8 Bolt

Class 8.8 bolts are one of the most common structure of hex bolts in the market. they provide acceptable rate of strength and hardness since they have average percentage of carbon in their structure, standing in between class 5.6 low carbon and 10.9 or 12.9 class which are high carbon steel hex bolts. class 8.8 bolts can withstand 80 kgs load per square millimeters and will remain in the elastic stage up to 80% of their proof load.

Load in Elastic Area N Proof Load N Proof Load Kg Effective Area mm^2 Minor Diameter mm Major Diameter mm Bolt Class
7957 9947 1014 12.68 4.019 M5 8.8
11158 13948 1421 17.733 4.773 M6 8.8
20605 25757 2625 32.82 6.466 M8 8.8
32810 41013 4180 52.26 8.16 M10 8.8
47847 59809 6096 76.21 9.853 M12 8.8
65697 82121 8371 104.64 11.546 M14 8.8
90434 113042 11523 144.04 13.546 M16 8.8
110788 138485 14116 176.46 14.993 M18 8.8
141810 177262 18069 225.87 16.993 M20 8.8
177785 222231 22653 283.17 18.993 M22 8.8
203482 254353 25928 324.1 20.319 M24 8.8
325673 407091 41497 518.72 25.706 M30 8.8
476480 595600 60713 758.92 31.093 M36 8.8
655841 819802 83568 1044.6 36.479 M42 8.8

Bolt and nut

Class 8.8 Bolt