Metric 8.8 Hexagon Bolts

A quenched and tempered carbon steel. Although class 8.8 is hardened, it is not as strong as class 10.9. It is often used in automobile applications. Class 8.8 is similar to grade 5.


Standard Specification : BS 3692

Material: Carbon Steel quenched and tempered

Dimensions: Normal Hex

Markings: ‘8.8’

Carbon: 0.25 – 0.55

Silicon: -0.035

Boron: -0.003

Phosphorus: -0.035

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