Using the Stud Bolt and Nuts Size Chart effectively requires knowing the key specifications of the bolt or nut you are working with. Start by identifying the nominal diameter and pitch of the bolt. Then, using the chart, match the correct nut size based on the diameter and thread type.

All dimensions are given in inches unless otherwise indicated. Heavy hex nuts are slightly larger and thicker than standard (finished) hex nuts. There are numerous grades and the heavy pattern is typically used for large diameter and high strength bolts.

Our metric stud bolt to nut table is meant to help determine the correct size bolt or nut for your purpose. Definitions of terms are located below the chart. Use the dimensions of your bolt to determine the appropriate size nut. The bolt chart provides both US and metric stud sizes.

ASME B16.5 and ASME B16.47, specify the stud bolt diameter and the number of bolts required in a bolted assembly, based on the pressure class, flange type, and , and from the stud bolt chart below, you can determine the corresponding nut size.

The following chart shows the quantity and size of bolts or studs require for a particular flange size and class. NOTE: The length of the stud bolt does not include the height of the points. Questions? Our material experts are ready to help guide you through your specific application.