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The M12x1 notation, commonly used in the metric system, denotes the thread size and pitch of the nut. Here, 'M12' refers to the major diameter of the thread, which is 12 millimeters, while the '1' signifies the pitch - the distance between each thread. This fine pitch allows for a tighter fit and greater stability when securing components together. The '75mm' denotes the length or height of the nut, providing ample space for engagement with bolts or screws in various applications.

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carriage bolts for deck posts