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Hex Bolt
Hex Bolt Grade Marking and Strength Chart


  Grade 2 or 307A
Low carbon steel
Best for general purpose use where high strength is not needed.

Tensile Strength: 60,000 psi
Grade 5
Tempered Medium Carbon Steel
Used for applications where higher strength is needed.

Tensile Strength: 120,000 psi
Grade 8
Tempered Medium Carbon Alloy Steel
Used for applications where higher strength and hardness is needed.

Tensile Strength: 150,000 psi
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