Structural Bolts
ASTM F3125 covers high strength structural bolts including Grades A325 and A490. These bolts are designed for steel-to-steel structural connections and include heavy hex bolts and tension control bolts. Birmingham Fastener houses the nation’s largest inventory of structural bolting components, both domestic and imported. Custom sizing is available. Our product line includes:
• F3125 Heavy Hex Bolts (A325, A490)
• F3125 Tension Control Bolts (F1852, F2280)
• DH Nuts
• F436 Washers
• DTI Squirters and Dura-Squirters
Grades: A325, A490
Finishes: Type 1, Type 3, Hot Dip Galvanized, Mechanical Galvanized
Available Dimensions: Heavy Hex Bolts
Tension Control Bolts
For more information and resources on structural bolts, check out the Structural Bolt Learning Hub.
ASTM Designations – Interpreting the Standards
Electroplated Fasteners: The Process and its Benefits
Electropolishing vs. Passivation – Choosing the Right Finish
Hot Heading vs. Cold Heading – What’s the Difference?
AASHTO and ASTM Standard Conversions
Rolled Thread vs. Cut Thread Bolts
A194 Nuts vs. A563 Nuts – Similarities and Differences
ASTM F3125: What Kind of Structural Bolts Does it Cover?
Can I Put a Hot-Dip Galvanized Nut on a Mechanical Galvanized Bolt?
Tension-Control Bolt Installation Problems
