Bulk & Factory Direct Supply
High-Strength Fastening for Critical Structural Applications
Structural bolts are engineered for high-load, high-stress connections, primarily used in steel-to-steel construction where strength and reliability are critical. Designed to meet strict industry standards, these bolts provide secure, long-lasting performance in demanding environments.
At Offshore Milling & Sourcing, we supply bulk structural bolts sourced directly from global manufacturers, ensuring compliance, consistency, and cost efficiency for large-scale projects.
Types Available
- Heavy Hex Structural Bolts
- Tension Control (TC) Bolts
- Fully Threaded Structural Bolts
- Partially Threaded Structural Bolts
- High-Strength Friction Grip Bolts
- Metric Structural Bolts
- Custom Per-Print Structural Bolts
Grades Available
- ASTM A325
- ASTM A490
- ASTM F3125
- Metric Class 8.8 / 10.9 / 12.9
- Other ASTM & DIN Specifications Available
Materials
- Medium Carbon Steel
- Alloy Steel
- Heat-Treated Alloy Steel
- Stainless Steel (upon request)
- Specialty Alloys (upon request)
Finish & Coating Options
- Plain Finish
- Hot Dip Galvanized
- Mechanical Galvanized
- Zinc Plated
- Weathering Steel Options
- Custom Corrosion-Resistant Coatings
Industries Served
- Construction & Infrastructure
- Steel Fabrication
- Bridges & Transportation
- Oil & Gas
- Energy & Utilities
- Industrial Plants
- Commercial & High-Rise Buildings
Applications
- Steel beam and column connections
- Bridge construction
- Structural frameworks
- Heavy equipment foundations
- Infrastructure and utility projects
- High-load fastening applications
Why Offshore Milling & Sourcing?
- Direct factory sourcing for competitive pricing
- High-volume, project-ready supply
- Compliance with ASTM and international standards
- Custom manufacturing to exact specs
- Reliable logistics for large-scale projects
Request a Quote
Looking for dependable structural bolts for your next project?
Contact Offshore Milling & Sourcing today for pricing, samples, and custom specifications.



