American Society for Testing and Materials (ASTM). Current edition approved Aug. 1, 2007. Published August 2007. Originally approved in 1994. Last previous edition approved in 2004 as F 1554 – 04. 9 p. This specification covers straight and bent, headed and headless, carbon, carbon boron, alloy, or high-strength lowalloy steel anchor bolts (also known as anchor rods). The anchor bolts are furnished in three strength grades, two thread classes, and in the sizes specified in Section 4.