Heavy Hex Bolts
![Heavy Hex Head Bolt Heavy Hex Head Bolt](https://sigmafasteners.com/wp-content/uploads/2010/02/Heavy-Hex-Head-Bolt-300x225.jpg)
There are several ASTM bolting specifications that require a heavy hex head – larger than a standard or finished hex head. These specifications include: A193, A320 and A307B. Although A325 and A490 bolts also require a heavy hex head, they refer to Structural Bolts for dimensional specifications, since structural bolts have shorter thread lengths than standard heavy hex bolts.
Heavy Hex Bolts are used in a varity of OEM equipment and can be manufactured in multiple ASTM grades.
Check Out Heavy Hex Bolts our Bolt Catalog for Sizes and Dimensions.