Whether for home farm builder or industrial customers national has all the right hardware in the sizes and finishes you need. With over a century of service national is committed to maintaining the highest level of product quality innovation and manufacturing technology. Providing a reliable barrier against unauthorized entries. Barrel bolts add additional security and are made in standard heavy duty or extra heavy duty versions for indoor and outdoor applications. Smooth black finish with excellent corrosion resistance because they are triple protected with zinc plate black chromate dip and black baked on enamel finish.
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