Bulk & Factory Direct Supply
Heavy-Duty Fastening with Classic Strength
Square head bolts are traditional fasteners known for their four-sided head design, offering increased surface area for wrench grip and resistance to rounding during installation.
Commonly used in heavy construction, industrial equipment, and restoration projects, square head bolts provide both functional strength and a classic, rugged appearance.
At Offshore Milling & Sourcing, we supply bulk square head bolts sourced directly from global manufacturers, ensuring durability, consistency, and cost efficiency.
Types Available
- Standard Square Head Bolts
- Heavy Square Head Bolts
- Fully Threaded Square Bolts
- Partially Threaded Square Bolts
- Structural Square Head Bolts
- Metric Square Head Bolts
- Custom Per-Print Square Bolts
Grades Available
- Grade 2
- Grade 5
- Grade 8
- ASTM A307
- ASTM A325 (Structural)
- ASTM A490
- Metric Class 8.8 / 10.9 / 12.9
Materials
- Low Carbon Steel
- Medium Carbon Steel
- Alloy Steel
- Heat-Treated Alloy Steel
- Stainless Steel 304
- Stainless Steel 316
- Specialty Alloys (upon request)
Finish & Coating Options
- Zinc Plated
- Yellow Zinc
- Black Oxide
- Hot Dip Galvanized
- Mechanical Galvanized
- Plain Finish
- Stainless (Natural Finish)
- Zinc Flake Coatings
- Custom Corrosion-Resistant Coatings
Industries Served
- Construction & Infrastructure
- Heavy Equipment & Machinery
- Agriculture Equipment
- Oil & Gas
- Utilities & Energy
- Rail & Transportation
- Restoration & Historical Projects
Applications
- Structural connections
- Heavy machinery assembly
- Utility and infrastructure builds
- Agricultural equipment fastening
- Timber and wood construction
- Restoration of vintage equipment and structures
Why Offshore Milling & Sourcing?
- Direct factory sourcing for competitive pricing
- High-volume, consistent supply
- Strict quality control and compliance
- Custom manufacturing capabilities
- Reliable logistics and delivery
Request a Quote
Looking for dependable square head bolts?
Contact Offshore Milling & Sourcing today for pricing, samples, and custom specifications.
