Bronze Hex Head Bolt Fastener，Copper Hexagonal Bolts, Conductive, Rust-proof, Non-magnetic Precision Fasteners

Product Overview

Copper hexagonal bolts are high-end precision fasteners specifically developed for special working conditions. Unlike conventional carbon steel and stainless steel bolts, they feature four core characteristics: high electrical and thermal conductivity, non-magnetic insulation, corrosion and rust resistance, and wear and aging resistance. The products are precision-forged from high-quality brass and copper, with a standard hexagonal head structure, compatible with various conventional wrenches and socket tools. They are easy to assemble, provide a secure lock, and are less prone to stripping or chipping. Leveraging the unique physical and chemical properties of copper, they perfectly solve industry pain points such as poor conductivity, magnetism, susceptibility to electrochemical corrosion, and high contact resistance found in ordinary fasteners. They are widely applicable to specialized scenarios such as electrical equipment, precision instruments, chemical and plumbing systems, new energy, and marine equipment, making them the preferred fastener for specialized industrial assembly.

Core Product Advantages

Made of pure copper, with exclusive performance and irreplaceable features.

Abandoning the use of mixed copper and copper-plated processes, this product is made from solid pure copper in a single piece, available in two main materials: brass and copper. It boasts stable performance and is made without any cost-cutting measures. Copper inherently possesses excellent ductility and toughness, making it resistant to breakage and deformation under stress. It remains securely locked even after long-term tightening and maintains thread integrity even after repeated disassembly and assembly, eliminating the problems of excessive rigidity leading to chipping or insufficient rigidity leading to deformation common in bolts. Furthermore, the copper surface has a dense protective oxide layer, eliminating the need for additional electroplating for corrosion protection. Its natural rust and oxidation resistance results in a service life far exceeding that of conventional fasteners.

High electrical and thermal conductivity, specifically designed for electrical applications.

Copper is a widely used industrial metal with high electrical and thermal conductivity. Its extremely low resistivity and excellent conductivity effectively reduce contact resistance at equipment connections, preventing safety hazards such as overheating, arcing, and leakage. Suitable for electrical grounding, conductive connections, equipment continuity, and temperature control, it perfectly replaces ordinary insulating, low-conductivity bolts, ensuring stable, safe, and compliant operation of electrical equipment. It is a dedicated fastener for power, electrical control, and new energy equipment.

Non-magnetic interference resistant, suitable for precision instruments

All our copper hexagonal bolts are non-magnetic and non-conductive, preventing electromagnetic interference and the absorption of metallic impurities. They are perfectly suited for applications requiring stringent magnetic field environments, such as precision instruments, medical equipment, communication instruments, and laboratory equipment. They completely solve the problem of magnetized steel bolts interfering with equipment accuracy and affecting instrument test data, ensuring the operational accuracy and stability of precision equipment.

Corrosion and wear resistant, suitable for complex working conditions

Copper possesses exceptional resistance to atmospheric corrosion, moisture corrosion, and weak acid and alkali corrosion. In humid, rainy, saline, and water-heated environments, it is resistant to rust, oxidation, and electrochemical corrosion. Furthermore, copper exhibits a moderate coefficient of friction and excellent wear resistance. Even under prolonged vibration and high-frequency use, its threads maintain a tight engagement, providing superior anti-loosening and anti-slip properties, eliminating the need for frequent maintenance and replacement.

Precision craftsmanship, zero tolerance for defects

Employing a one-piece cold heading process, the hexagonal head is regular and symmetrical, ensuring even force distribution on all six sides, and providing high-torque fastening without slippage or rounding. The threads are machined using high-precision CNC thread rolling technology, resulting in full and regular tooth profiles, accurate pitch, no burrs, and no broken teeth. Strictly conforming to national and German standards, it has passed go/no-go gauge testing and is perfectly compatible with nuts and washers of the same specifications, offering excellent interchangeability and suitability for both automated mass assembly and manual installation.

Product Specifications and Standards

Implementation Standards

These units are standardized using metric units such as ASME, DIN, and GB, and have excellent characteristics such as precise dimensions, wide applicability, and compatibility with domestic and foreign equipment.

Surface condition

The original copper color is unplated, preserving the original properties of copper without affecting conductivity or risking plating peeling; the surface is smooth without burrs, oxidation spots, or cracks, and is in perfect condition, making it suitable for direct use in equipment assembly and exterior decoration.

Professional application scenarios

1. Electrical and Power Industry: Distribution cabinets, distribution boxes, motor bases, equipment grounding, busbar connections, and conductive fastening of electrical control equipment, ensuring stable power supply and eliminating the risk of overheating.

2. Precision Instruments and Equipment: Medical instruments, communication equipment, laboratory precision instruments, and testing meters; non-magnetic interference protection to ensure equipment accuracy.

3. Plumbing and Chemical Industry: Plumbing valves, pipe fittings, water purification equipment, and equipment for weak acid and weak alkali conditions; corrosion-resistant and rust-proof, suitable for humid environments.

4. New Energy Industry: Photovoltaic equipment, energy storage cabinets, lithium battery components, and new energy electrical control systems; high conductivity and low resistance, suitable for precision operating conditions in new energy.

5. Outdoor Special Scenarios: Seaside equipment, open-air hardware facilities, and equipment in humid factory areas; salt spray resistant, oxidation resistant, long-lasting, durable, and maintenance-free.

6. Decorative Hardware: High-end hardware accessories and decorative equipment fastening; premium original copper texture, combining fastening and decorative effects.

Production process and quality control assurance

1. Raw Material Selection: We select high-purity copper from major manufacturers, ensuring the material composition meets standards and eliminating the use of impurities or recycled copper, guaranteeing stable product performance from the source.

2. One-Piece Molding: Forged using fully automated cold heading equipment, the head and screw are integrally formed, with no seams, resulting in a dense and uniform structure.

3. Precision Thread Rolling: High-precision CNC thread rolling is performed, with strict control over thread tolerances and full inspection of go/no-go gauges, ensuring high engagement accuracy and eliminating stripping and disengagement issues.

4. Fine Polishing: The surface undergoes fine polishing to remove burrs and scratches, resulting in a smooth appearance and smooth assembly.

5. Multi-Layer Quality Inspection: Each batch undergoes dimensional inspection, material testing, and appearance screening to eliminate defective products, ensuring a 100% pass rate.

Q: Can copper hexagonal bolts be used outdoors in humid environments for extended periods?

A: Absolutely. Pure copper has natural anti-oxidation and anti-corrosion properties, requiring no electroplating coating. Unlike steel bolts, they won't rust, oxidize, or peel off in humid, rainy, saline, or lightly salty coastal environments. They are highly stable and resistant to blackening and corrosion over long-term use, making them suitable for long-term outdoor applications.

Q: Are copper bolts non-magnetic? Will they interfere with precision equipment?

A: All our pure brass and copper hexagonal bolts are non-magnetic and non-conductive, causing no electromagnetic interference and not attracting metal dust or impurities. They are safe for use in high-precision applications such as medical equipment, communication instruments, laboratory precision equipment, and testing instruments, without affecting equipment accuracy or test data.

Q: Are the copper bolts hard enough? Will they break or strip when tightened?

A: Our products are manufactured using a one-piece cold-forging precision molding process, resulting in full thread profiles and a dense structure, making them perfectly suitable for conventional equipment fastening and heavy-duty engineering applications. Copper bolts possess excellent toughness, making them resistant to brittle fracture and thread breakage under stress. Compared to stainless steel bolts, their advantages lie in their resistance to stripping and thread damage from repeated disassembly and assembly, making them suitable for scenarios requiring frequent maintenance and assembly. However, they are not recommended for use in ultra-high pressure or ultra-heavy load mechanical fastening applications; selection should be based on specific needs.

Q: Why are pure copper bolts not electroplated? Can plating be applied?

A: The original copper is pure and unplated. The core purpose is to preserve the original electrical and thermal conductivity of copper, avoiding plating that could impede conductivity or cause long-term plating peeling and affect equipment performance. Plating is not required for standard operating conditions. For special anti-corrosion or decorative plating, non-standard customization is supported.

Q: Do you support non-standard customization? What is the delivery time?

A: We support full-specification non-standard customization, including extended lengths, shortened lengths, fine threads, coarse threads, irregular sizes, special thread pitches, and processing based on provided drawings or samples. Standard specifications are readily available in large quantities and can be shipped the same day. For non-standard customized products, delivery time is calculated based on quantity, with stable delivery times for bulk orders, meeting the needs of engineering projects and factories for bulk matching.

Q: Can copper bolts be used with ordinary iron nuts?

A: They can be used temporarily, but long-term use is not recommended. Contact between iron and copper easily causes an electrochemical reaction, and prolonged exposure to humid environments will accelerate oxidation and corrosion, affecting tightening and conductivity. For long-term use, it is recommended to use copper nuts and washers of the same material for optimal corrosion resistance, loosening prevention, and conductivity.