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In the context of a hex bolt specification such as "5-16NC," the "NC" stands for National Coarse. This indicates the thread pitch of the bolt, specifically that it follows the National Coarse thread standard. National Coarse threads have fewer threads per inch compared to National Fine threads, making them better suited for applications where rapid assembly or disassembly is required.

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National Course for the type of thread

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Wiki User

11y ago
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Q: Hex bolt 5-16nc what does the nc mean?
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