Carriage and Timber bolts have no drive, and machine threads for use with a nut.
Carriage heads are large smooth and domed with no drive.
A corrosion resistant steel alloy. The most common stainless steel for general hardware use.
A highly corrosion resistant grade of stainless steel. Ideal in salt water and chlorine environments.
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Bolts with a very large flat head and machine threads for use with a nut.