ASTM A 193/A 193M REV A Specification for Alloy-Steel and Stainless Steel Bolting Materials for High Temperature or High Pressure Service and Other Special Purpose Applications. Many objects can be easily attached and/or suspended using threaded rod. For the best structural predictability, it is important to select this structural grade of threaded rod. Use the convenient strength table as a guide when designing and installing suspended objects and assemblies.