A307 - Material

This specification covers the chemical and mechanical requirements of three grades of carbon steel bolts, studs, and threaded rod, with tensile strengths ranging from 60 000 psi to 100 000 psi (414 to 689 MPa).

Next time you grab a standard zinc bolt at the supply house, you’re likely holding A307. a307 material

If a manufacturer’s mark is used, it must be distinct from the grade symbol. and threaded rod

(Abbreviated)