A tempered Alloy Steel. Grade 8 is stronger than grade 5, and is usually used in high strength automobile applications. The finish is unplated.
Standard Specification: SAE J429 Grade 8
Material: Alloy Steel
Dimension: Normal Hex
Marking: Six Radical Lines
Carbon: 0.03-0.48 / 0.35-0.53
Hex Bolt UNC / UNF Grade 8 Technical Info
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