F1554 does not specify a heavy hex head or hex head, but instead allows the manufacturing company to use either style at the manufacturer’s option, unless otherwise specified.
![F1554 Anchor Bolts](https://www.f1554anchorbolts.com/wp-content/uploads/sites/5/2017/03/f1554-header-min.png)
F1554 does not specify a heavy hex head or hex head, but instead allows the manufacturing company to use either style at the manufacturer’s option, unless otherwise specified.