ASTM A394-08(2015)

1.1 This specification covers the chemical and mechanical requirements of hexagon and square-head zinc-coated steel bolts and atmospheric corrosion-resistant bolts, in nominal thread diameters of ¹/₂ , ⁵/₈ , ³/₄ , ⁷/₈ and 1 in. for use in the construction of transmission towers, substations, and similar steel structures. The various types of bolts covered in this specification are:

1.1.1 Type 0-Hot-dip zinc-coated bolts made of low or medium carbon steel.