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China Suppliers Factory Black Zinc Oxide CSK Flat Head Hexagonal Bolt Screw - Carbon Steel, Alloy Steel, Stainless Steel
Structure and Characteristics
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Head Design: Flat surface allows alignment with the workpiece, reducing protrusions for a streamlined appearance. The conical bottom fits pre-made counterbores for a secure fit.
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Hexagonal Drive: Center hexagonal groove (ISO 4762) ensures full engagement with wrenches, enabling high torque transmission and preventing slippage.
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Threaded Section: Available in metric coarse (M4, M6) or fine threads (M8 × 1.25), with customizable lengths and diameters.
Main Application Scenarios
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Mechanical Manufacturing: Precision equipment assembly like machine tools and molds where space is limited.
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Automotive Industry: Reliable connections for engines, transmissions, chassis, and critical components.
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Electronic Products: Structural fixation for compact devices like laptops and smartphones.
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Aerospace: Lightweight designs requiring high-strength connection points.
Core Advantages
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High Torque: Large contact area between the hex hole and wrench withstands significant tightening force.
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Space Saving: Flush installation is ideal for small or aesthetically sensitive environments.
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Anti-Loosening: Highly effective against vibration-induced loosening when used with washers or thread glue.
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Aesthetics: Clean finish with no exposed bolt heads for high-end product requirements.
Specifications and Standards
Material: Carbon steel (galvanized/blackened), Stainless steel (304/316 for corrosion resistance), Titanium alloy (lightweight/high-strength).
Size Standards: Metric (ISO 4762), American (ANSI/ASME B18.3), Diameter range M2 to M24.
Surface Treatment: Galvanized (rust-proof), Dacromet (heat/corrosion resistance), Electrophoretic (decorative).
Frequently Asked Questions
What materials are available for these fasteners?
We offer carbon steel (galvanized or blackened), stainless steel (304/316), and lightweight titanium alloys.
Which standards do your products follow?
Our products adhere to international standards including Metric (ISO 4762) and American (ANSI/ASME B18.3).
What are the benefits of the flat head design?
The flat head allows the bolt to sit flush with the surface, saving space and providing a clean, aesthetic appearance.
Can these bolts handle high torque?
Yes, the internal hexagonal drive provides a large contact area, allowing for high torque transmission without slipping.
What surface treatments are available for rust prevention?
Common treatments include galvanizing, Dacromet for high-temperature resistance, and electrophoretic coatings.
Are these suitable for the automotive industry?
Absolutely. They are widely used in engines, transmissions, and chassis due to their high reliability and strength.