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WSG-1068 METRICS
BOLT STRENGTH IDENTIFICATION
English System
English (inch) bolts: Identification marks correspond to bolt strength, increasing number of slashes represent increasing
strength.
Metric System
Metric (mm) bolts: Identification class numbers correspond to bolt strength, increasing numbers represent increasing
strength. Common metric fastener bolt strength property are 9.8 and 10.9 with the class identification
embossed on the bolt head.
HEX NUT STRENGTH IDENTIFICATION