Countersunk hex head bolts combine the advantages of a hexagonal drive system with a flat countersunk head, providing strong clamping force and a neat flush finish. These hex head countersunk bolts are widely used in construction, machinery assembly, steel structures, and automotive engineering for safety, aesthetics, and reliability.
๐ฉ What is a Countersunk Hex Head Bolt?
A countersunk hex head bolt features:
- Head Type: Flat countersunk head for flush installation
- Drive Type: Internal hex socket (Allen drive) for secure tightening
- Thread Types: Metric threads (M4, M5, M6, M8, M10, M12) and UNC/UNF threads
- Material Options: Carbon steel, stainless steel (304 / 316), alloy steel, titanium
- Length: From 6mm to 150mm or customized for project requirements
- Standards: DIN 7991 / ISO 10642
These countersunk hex bolts ensure that surfaces remain flat and hazard-free, with strong torque application capability.
โ Key Specifications
- Thread Sizes: M4 โ M12 standard, custom sizes available
- Material Grades:
- Carbon Steel (Grade 8.8 / 10.9 / 12.9): heavy-duty fastening
- Stainless Steel 304 / 316: corrosion resistance for marine and outdoor use
- Titanium: lightweight and strong for aerospace and medical applications
- Finish: Plain, zinc plated, black oxide, hot-dip galvanized, anodized titanium
โ๏ธ Applications of Hex Head Countersunk Bolts
โ Steel structure connections โ ensures flush and safe surfaces
โ Machinery assembly โ flat head avoids protrusions and ensures aesthetics
โ Automotive components โ body panels, chassis, and frame connections
โ Construction installations โ stair treads, safety barriers, and flooring plates
โ Marine and offshore engineering โ stainless steel and titanium options for corrosion resistance
๐ง Advantages of Choosing Our Countersunk Hex Head Bolts
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Flush head design for neat finish and safety
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Hex socket drive enables high torque tightening
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High tensile strength for demanding mechanical and structural applications
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Wide size and material range to suit diverse industries
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OEM & ODM manufacturing for custom specifications and branding
๐ฆ Packaging & Supply Details
- MOQ: 1,000 pcs per size
- Packaging: Bulk cartons with pallets / small boxes with labels / OEM branded packaging
- Lead Time: 7โ15 working days depending on customization
- Customization: Diameter, length, head type, material grade, coating, branding
๐ก Why Choose Our Countersunk Hex Bolts?
As a professional countersunk hex head bolt manufacturer and supplier, we provide:
โ Strict quality control from raw material sourcing to machining and final inspection
โ Competitive factory pricing with stable supply
โ OEM & ODM services for construction hardware brands, machinery manufacturers, automotive suppliers, and fastener distributors
โ Export experience to Europe, North America, Southeast Asia, and the Middle East
๐ Learn More
Looking for reliable hex head countersunk bolts for your mechanical and structural assembly projects?
๐ Visit our product page here to view detailed specifications and place your order directly with the factory.
๐ฉ Contact Us Today
Get in touch for technical drawings, CAD support, free consultation, and factory-direct quotations to support your construction, engineering, and manufacturing projects.