Black-Plated Hexagon Socket Countersunk Head Bolts

• Customization: Available
• Material: High Strength Steel
• Type: Round Head
• Model NO.: GB/T 70.3-2008
• Connection: Common Bolt
• Head Style: Round
• Standard: DIN, GB
• Grade: 8.8
• Application: Machinery, Chemical Industry, Environmental, Building
• Finish: Black
• Transport Package: Bag
• Specification: M2-M20
• Trademark: LING KE
• Origin: Yong Nian
• HS Code: 731815
• Production Capacity: 200000/Year
• Package Size: 50.00cm * 20.00cm * 20.00cm
• Package Gross Weight: 50.000kg

Product Description

Electro - galvanized hexagon socket countersunk head bolts are a popular type of fastener, widely used in diverse industries due to their unique design and beneficial properties.

Materials

Strength Grades

Applications

Black - plated hexagon socket countersunk head bolts are commonly made from carbon steel. Carbon steel is a popular choice due to its good combination of strength and cost - effectiveness. It can be easily processed and formed into the desired bolt shape. For applications that require higher strength and better corrosion resistance, alloy steel may be used. Alloy steel contains additional alloying elements, such as chromium, molybdenum, or vanadium, which enhance its mechanical properties. In some cases, stainless steel bolts may also be black - plated. Stainless steel offers excellent corrosion resistance in a wide range of environments, and the black - plating further enhances its aesthetic appeal while maintaining its corrosion - resistant properties. This makes stainless - steel black - plated bolts suitable for applications in harsh environments, such as marine or chemical industries.

The strength of these bolts is classified according to different strength grades. Common strength grades include 4.8, 8.8, 10.9, and 12.9. The first digit in the grade number (e.g., 4 in 4.8) represents the ratio of the tensile strength of the bolt to 100 MPa. The second digit (e.g., 8 in 4.8) represents the ratio of the yield strength to the tensile strength. Higher - grade bolts, such as 10.9 and 12.9, are made from stronger materials and are often heat - treated to achieve their high strength levels. These high - strength bolts are suitable for applications with heavy - load requirements, such as in structural construction, heavy - duty machinery, or automotive suspension systems. Lower - grade bolts, like 4.8, are more suitable for applications with lighter loads, such as in general - purpose furniture assembly or light - duty equipment.
4. Applications

Furniture Industry
In the furniture industry, black - plated hexagon socket countersunk head bolts are widely used. Their flush - mounted head design allows for a clean and smooth surface finish, which is highly desirable in furniture. They can be used to assemble wooden or metal furniture components, such as table legs, chair frames, or cabinet doors. The black - plated finish also adds an element of style to the furniture, making it more appealing to consumers. For example, in modern - style furniture, the black - colored bolts can complement the overall design theme and create a more cohesive look.

Automotive and Machinery
In the automotive and machinery industries, these bolts are used in a variety of applications. In automotive manufacturing, they can be used to fasten parts in the engine compartment, such as engine mounts, brackets, or pulleys. The high - strength grades of these bolts are capable of withstanding the vibrations and mechanical stresses associated with engine operation. In machinery manufacturing, they are used to assemble different types of equipment, such as industrial motors, pumps, or conveyor systems.

Packing & Delivery

 cartons/plastic bags

Small Quantities (Retail/Samples):
For retail or small-batch orders (e.g., 10–100 pieces), bolts are often packed in sealed plastic bags or blister cards to prevent scratches, moisture, and loss. Blister packaging with cardboard backings is common for display in hardware stores, as it clearly shows the product while keeping it secure.
Bulk Shipments (Wholesale):
Large quantities (500–10,000+ pieces) are packed in corrugated cardboard boxes for durability during transit. Inner dividers (e.g., cardboard partitions or foam inserts) may be added to separate bolts by size, preventing friction, deformation, or thread damage. For heavy-duty or large-size bolts (e.g., M12 and above), reinforced cartons with double walls are used to withstand stacking pressure.

Company Profile

Company Name

 Hebei LING KE Metal Products Manufacturing Co.has firmly established itself as a leading force in the fastener industry, with a rich history and a commitment to excellence that spans over 10 years. Since its inception, the company has been dedicated to providing high-quality fasteners and comprehensive fastening solutions to a diverse range of industries worldwide.In recent decades, Hebei LING KE Metal Products Manufacturing Co. has expanded its footprint globally, establishing strategic partnerships and distribution centers in key regions around the world. This has allowed the company to better serve its international customer base and meet the growing demand for its products in emerging markets.