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Carriage Bolts

Carriage bolts have a dome shaped head and square neck, and are generally used in applications involving wood construction like docks & outdoor decks, but can also be used in metal applications.

Our inventory of carriage bolts include a variety of lengths, diameters, and coatings including zinc and galvanized coatings, and 18-8 or 316 stainless steel.

Most carriage bolts under 6 inches are fully threaded, lengths over 6" always have 6 inches of thread. This excludes Stainless Steel.


Select a Material & Finish    Carriage Bolt   
Hot Dipped Galvanized Carriage Bolts
Low carbon steel, best for general use applications (comparable to Grade 2). Galvanized bolts are very corrosion resistant and are commonly used outdoors. Galvanized bolts must be used with galvanized nuts due to the thickness of the coating.
Zinc Carriage Bolt
Low carbon steel, best for general use applications (comparable to Grade 2). Zinc Plating is the most common finish and provides moderate protection against corrosion. Shiny silver in color.
Grade 5 Carriage Bolt Head Marking
Medium carbon steel, for higher strength applications. Zinc Plating is the most common finish and provides moderate protection against corrosion. Shiny silver in color.
18-8 Stainless Steel Carriage Bolt
18-8 Stainless Steel provides a high level of corrosion resistance, and is recommended for use outdoors. 316 Stainless provides the highest level of corrosion resistance, and is recommended for food-grade applications, as well as salt-water applications.
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