The specification is divided into three distinct grades, each suited for specific applications:
Fasteners under this standard are categorized into three primary grades—, B , and C —which define their tensile strength and intended use. ASTM A307 - Portland Bolt astm a307 pdf
ASTM A307 is a standard specification for carbon steel bolts, studs, and stud bolts used in flanges, pipes, and other pressure vessels. Here's a brief overview: The specification is divided into three distinct grades,