Deciphering the Head Marking
In the industrial fastener world, head markings are not just brand logos; they are technical indicators. The most common marking you'll see is **8.8**. #The Mathematical Breakdown
- **8:** Nominal tensile strength of 800 MPa. - **.8:** The bolt will begin to yield (permanently deform) at 80% of its ultimate tensile strength. #Application Context
Grade 8.8 is considered 'high tensile' and is the standard requirement for most structural steel connections and automotive chassis components. If you see '8.8' on a bolt, you are dealing with a component that has been heat-treated and tempered to achieve its strength.PROJECT REQUIREMENTS?
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