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 structural bolt 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

View available structural bolt dimensions:

Heavy Hex Bolts 
Tension Control Bolts 

Structural Bolt Learning Hub

At Birmingham Fastener, we are committed to providing you the fasteners and the knowledge needed when it comes to structural bolts, storage, application, and more. We have developed the Structural Bolt Learning Hub to answer common questions surrounding structural bolting. Check out our blogs, videos, and charts to learn more. As always, if you have a question about structural bolts, feel free to reach out to one of our fastener experts today!