Fastener identification markings

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Metric bolt Class 5.8

Metric bolt Class 8.8

Metric bolt Class 10.9

SAE bolt grade 2

SAE bolt grade 5

SAE bolt grade 8

png file

svg file

Metric nut Class 5.8

Metric nut Class 8.8

Metric nut Class 10.9

SAE nut grade 2

SAE nut grade 5

SAE nut grade 8
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