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Regular Square Nuts

Thicker than the machine screw style. Made of ASTM A563 Grade A steel with a Rockwell Harness of B68-C32 and proof load of 90,000 psi minimum. Available in Hot Dipped Galvanized for heavy duty corrosion resistance, Zinc plated for medium corrosion resistance and plain steel for dry conditions. Good for medium duty and heavy duty applications.

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