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Technical Info

At Birmingham Fastener, we aim to provide you with the knowledge and tools for your project. Our constantly expanding Fastener Learning Hub is full of information and insights for a variety of industries. View bolt length charts, read product comparisons, and find answers to your questions about fasteners.

Nut Compatibility Chat for ASTM A325 and A490

For information on choosing the correct nuts for our F3125 structural bolts, please see the chart below. If you have any additional questions, contact our sales team.
Nut Spec A563 A563 A563 A563 A563 A194
Nut Grade C C3 D DH DH3 2H
A325, Type 1 * * * * * *
A325, Type 3   *     *  
A325, Galvanized       *   *
A490, Type 1       * * *
A490, Type 3         *