1-1/4" x 4-3/4" ASTM F3125 A325 Type 1 Heavy Hex Structural Bolt - Plain

When pairing a nut with a hex bolt, the material and finish must match. If these do not match, the nut will not fit the bolt.

These 1-1/4" diameter Conquest A325 Type 1 Structural Bolts are engineered for steel-to-steel connections in bridge building, structural framing, and infrastructure projects. Their heavy hex design maximizes torque and load retention, helping maintain strong, stable assemblies under dynamic loads.

ASTM F3125 Compliant 1-1/4" Hex Bolts for Structural Applications

Manufactured to meet ASTM F3125 (A325) standards, these structural bolts provide the strength and consistency demanded by contractors and engineers. The plain finish allows for installation in non-corrosive, controlled environments where additional coatings are not required.

Key Features

• 1-1/4" Diameter Bolt: Built for heavy-duty structural joints and high-load connections.
• ASTM F3125 (A325) Compliant: Assures strength, durability, and code compliance.
• Heavy Hex Head Design: Improves torque retention and clamping force.
• Plain Finish: Ideal for indoor or protected environments without additional coatings.
• Steel-to-Steel Focused: Designed for beams, columns, plates, and structural assemblies.
• Jobsite Ready: Clean threading and consistent sizing for efficient installations.
• Trusted by Pros: Used in bridgework, commercial steel erection, and infrastructure projects.

Common Applications

• Bolting structural steel beams and girders in bridge construction
• Steel frame connections in commercial and industrial buildings
• Support assemblies for highway sign structures and overpasses
• Joining columns, braces, and plates in steel-to-steel joints
• Heavy-duty fastening in fabrication shops and on-site erection projects

Installation Tips

• Always use matching heavy hex nuts and hardened washers with matching finish
• Apply installation torque using turn-of-nut or calibrated wrench methods per job specifications
• Check for full thread engagement and flush bearing surfaces before final tightening

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