Jessica's FAQs
Can all A307A material be certified to Grade 2?
Answer No, not all A307A material can be certified to Grade 2. Size and Configuration Limitations The Grade 2 specification has different mechanical requirements depending on the diameter, length, and type of fastener. Proof Load Requirement Grade 2 fasteners must successfully pass a proof load test, confirming that the fastener can withstand a specified load... Read more
What is the Difference Between Type 1 and Type 3 Structural Bolts?
The ASTM F3125 specification covers heavy hex structural bolts including Grades A325 and A490. Both grades include Type 1 and Type 3 options. Tension control bolts in Grades F1852 and F2280 are also available in both Type 1 and Type 3. What is the difference? Type 3 bolts are made from weathering steel designed to eliminate... Read more