Heavy Hex Bolts, A307 Grade B (inch)
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The ASTM A307 bolts are available in Grade B which are manufactured from a medium carbon steel, thus yielding a stronger hold than grade A bolts. While the A307, Grade B bolts offer a similar tensile strength they offer a higher yield strength of almost double that to Grade A. To complete an installation, consider if you need any hex nuts to fully secure the connection.