Carriage Bolts

Carriage Bolts

ASTM A307-Grade A Carriage bolts are used to fasten metal to timber.  The square shoulder under the rounded head helps hold the bolt in place once tightened.  Carriage bolts come in a variety of sizes and materials such as:  Zinc-plated:  Better corrosion resistance Grade 5 Steel:  Most commonly used in automotive industry Stainless Steel 18-8: 

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