What is a projecting tooth or prong, as in a part of a lock, or the plate of a belt clamp, or the end of a tool, as a chisel, where it enters the handle called?

fang — (Mech.) A projecting tooth or prong, as in a part of a lock, or the plate of a belt clamp, or the end of a tool, as a chisel, where it enters the handle. (Webster's 1913.)

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