Brass socket head cap screws are forged or machined from copper-zinc alloys (such as H62 and H65) and possess excellent ductility. Their surface is typically polished to the natural brass color or passivated to prevent oxidation. With a tensile strength of approximately 400-600 MPa, they meet the core requirements for non-magnetic properties and resistance to electrochemical corrosion.

Product Parameters

Common materials	H62, H65 (ordinary brass), HPb59-1 (free-cutting brass)
Implementation standards	GB/T 2671 (Chinese National Standard), ISO 7380 (International Standard), ASME B18.3 (American Standard, optional)
Nominal specifications	M3, M4, M5, M6, M8, M10 (common metric sizes); M12 and larger sizes are available for customization.
Mechanical properties	Tensile strength ≥400 MPa (H62/H65), ≥340 MPa (HPb59-1)
Surface treatment	Natural finish (standard), passivation (for oxidation resistance), nickel plating (optional, for enhanced wear resistance and appearance)
Packaging requirements	Individually packaged using VCI anti-rust paper/vacuum bags to prevent oxidation and discoloration.

Advantages of Brass Socket Head Cap Screws

Corrosion Resistance

Brass socket head cap screws resist seawater, humid climates, and various chemical media, offering an exceptionally long lifespan far exceeding that of ordinary bolts.

Safety and Explosion-Proof

Spark-free upon impact, suitable for flammable and explosive environments such as oil and gas plants and chemical plants.

Conductivity and Non-Magnetic Properties

Meets the special requirements of electronic, electrical, and medical equipment for non-magnetic interference and conductivity.

High Strength

Made of high-quality brass, balancing mechanical strength with long-term fatigue resistance.

Precise Dimensions and Threads

Strictly adheres to international standard ISO 898-1, ensuring smooth installation.

Application Scenarios

Marine and Marine Engineering

Used for components that are in long-term contact with a salt spray environment, such as ship deck fasteners, mooring devices, seawater pumps and valves, and offshore platform structural components.

Petrochemical and Gas Equipment

Suitable for equipment with strict explosion-proof requirements in flammable and explosive areas, such as gas pipeline flanges, storage tank manhole covers, pump connections, and instrument valves.

Water Supply Systems and Valves

Mainly used in connection points that are in direct contact with water, such as drinking water pipeline flanges, filter housings, control valve assemblies, and water treatment equipment.

Why Source Brass Bolts From Us?

Quality Assurance

Comprehensive quality control throughout the entire production process, from raw material warehousing to finished product delivery, including 100% dimensional inspection and material certification.

Professional Experience

Years of experience in precision brass component manufacturing.

Capacity and Delivery

With a building area of 10,000 m², an annual production capacity of 100,000 tons, enabling rapid delivery and meeting bulk purchasing needs.

Customization Support

Flexible small-batch sample services and OEM/ODM support are available.

FAQ

Q: Can you provide imperial specifications or accept custom non-standard sizes?

A: Yes, we support metric, American, and imperial threads, and can accommodate flexible requirements such as non-standard lengths and custom markings.

Q: Are Brass Socket Head Cap Screws non-magnetic?

A: Yes, brass itself is non-magnetic, making it suitable for use in electronics, electrical equipment, and precision instruments.

Q: Do the screws require any additional surface treatment?

A: Generally, no surface treatment is needed. However, if there are requirements for appearance or wear resistance, polishing or nickel plating can be applied.

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