If you need a standard hex bolt for your project, consider the line of ASTM A307 hex bolts offered in Grade A and B. The A307, grade A hex bolts are best for light duty projects that would rather have a bolt fail and allow the components to separate in lieu of causing damage to the structure. The minimum tensile strength on the bolts are 60,000PSI and will typically have a '307A' marking on the head. If you’re in need of a stronger bolt, consider the A307 heavy hex bolts grade B. These bolts are manufactured with a heavier grade steel suitable for a project requiring higher, minimum tensile strength of 60,000 to 100,000PSI. The A307 heavy hex bolts, grade B are available in plain steel, zinc and hot dip galvanized to suite the project requirements. Lastly consider the B7 Heavy Hex Bolts that offer a minimum strength of 125,000PSI for your heavy-duty needs. The B7 Bolts are stocked in plain steel only but can be sent for secondary processing if you require custom plating.
