Marks on the head of a bolt indicate the:

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Multiple Choice

Marks on the head of a bolt indicate the:

Marks on the head of a bolt identify its grade and property class, which tell you the bolt’s strength and hardness. This lets you choose a fastener that can handle the expected load and be torqued to the correct specification. Thread pitch is determined by the thread standard and is checked with a gauge, not by head markings. Length is measured separately and isn’t indicated by the head marks, and color coding isn’t a universal, reliable indicator of strength. So the head markings are all about the bolt’s grade and property class.

Marks on the head of a bolt identify its grade and property class, which tell you the bolt’s strength and hardness. This lets you choose a fastener that can handle the expected load and be torqued to the correct specification. Thread pitch is determined by the thread standard and is checked with a gauge, not by head markings. Length is measured separately and isn’t indicated by the head marks, and color coding isn’t a universal, reliable indicator of strength. So the head markings are all about the bolt’s grade and property class.

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