Overview
Hex cap screws are precision-manufactured fasteners featuring a hexagonal head and machine threads designed for use in tapped holes or with nuts. Unlike standard hex bolts, hex cap screws are manufactured to tighter dimensional tolerances and typically include a washer face under the head.
Hex cap screws are widely used in machinery, structural steel, automotive assembly, heavy equipment, energy infrastructure, and OEM manufacturing.
Offshore Milling & Sourcing supports bulk and factory-direct sourcing programs for hex cap screws, serving distributors, OEM manufacturers, steel fabricators, and procurement teams requiring dependable supply and competitive volume pricing.
Types of Hex Cap Screws Available
- Standard Hex Cap Screws
- Fully Threaded Hex Cap Screws
- Partially Threaded Hex Cap Screws
- Structural Hex Cap Screws
- Heavy Hex Cap Screws
- Metric Hex Cap Screws
- Custom Per-Print Hex Cap Screws
Specifications
- Diameter Range: 1/4″ – 3″+ (Metric M6 – M72+)
- Length Range: 1/2″ – 24″+
- Thread Type: UNC / UNF / Metric Coarse / Metric Fine
- Head Style: Standard Hex / Heavy Hex
- Standards: ASME B18.2.1 / ASTM / SAE J429 / DIN / ISO
Hex cap screws are designed for controlled clamping force and structural reliability.
Grades Available
- Grade 2
- Grade 5
- Grade 8
- ASTM A307
- ASTM A325 (structural)
- ASTM A490
- Metric Class 8.8 / 10.9 / 12.9
Grade selection is based on tensile strength requirements and application load conditions.
Materials
- Low Carbon Steel
- Medium Carbon Steel
- Alloy Steel
- Heat-Treated Alloy Steel
- Stainless Steel 304
- Stainless Steel 316
- Specialty alloys upon request
Material choice depends on strength requirements and environmental exposure.
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 available
Finish requirements vary by environment and structural exposure.
Industries Served
- Structural Steel Fabrication
- Heavy Equipment Manufacturing
- Automotive
- Oil & Gas
- Power Generation
- Construction
- Infrastructure
- Industrial Distribution
Applications
- Machinery assembly
- Structural steel connections
- Equipment mounting
- Heavy industrial equipment
- Automotive systems
- Infrastructure projects
Hex cap screws are ideal for applications requiring consistent torque performance and structural integrity.
Strategic Bulk Sourcing Programs
Hex cap screws are among the most commonly imported industrial fasteners due to high-volume demand across multiple sectors.
We support:
- Factory-direct container programs
- Mixed SKU consolidation
- Secondary sourcing strategies
- Blanket purchase agreements
- Custom forging programs
- Mill-direct sourcing
- Private label packaging
Our sourcing programs are structured for distributors and OEMs seeking long-term supply reliability and scalable capacity.
Packaging Options
- Bulk cartons
- Palletized shipments
- Gaylord containers
- Custom-labeled packaging
- OEM packaging
- Mixed container programs
Request a Quote
To receive pricing for hex cap screws, please provide:
- Diameter
- Length
- Grade
- Finish
- Quantity
- Delivery timeline
Mill test reports and certifications are available upon request.
