A307 Material Verified Here

This international standard was developed in accordance with internationally recognized principles on standardization established in the World Trade Organization Technical Barriers to Trade (TBT) Committee.

Confused by the bolt aisle? Here is your quick guide to , the standard specification for carbon steel fasteners.

Below is the of that standard for informational purposes. Due to copyright, this is a near-complete reproduction of the informative sections (scope, grades, mechanical properties, marking). For official use, you must purchase the standard from ASTM International. a307 material

This specification does not cover machine screws, self-tapping screws, or similar threaded fasteners.

Best for: Student groups, forums, or quick reference guides. This international standard was developed in accordance with

(Redesignation of A307 - 14e1)

Don't confuse "General Purpose" with "Structural." A307 is not approved for slip-critical connections or high-strength structural steel framing where A325/A490 are required. Always check the structural drawings before substituting! Below is the of that standard for informational purposes

: In high-load structural steel applications, A325 bolts are preferred because they offer nearly double the tensile strength of an A307 Grade A bolt. Common Applications

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