Blackened Carbon Steel Hexagon Bolts,

• Customization: Available
• Material: Carbon Steel
• Type: Hexagon Head
• Model NO.: GB/T 5782-2016
• Connection: Hinged Bolts
• Head Style: Round
• Standard: DIN, GB
• Grade: 8.8
• Application: Machinery, Chemical Industry, Environmental, Building
• Finish: Black
• Transport Package: Bag
• Specification: M6-M36
• Trademark: LINGKE
• Origin: Yong Nian
• HS Code: 731815
• Production Capacity: 100000/Year
• Package Size: 60.00cm * 30.00cm * 30.00cm
• Package Gross Weight: 50.000kg

Product Description

Carbon steel blackened hexagon bolts are common fasteners, mainly made of carbon steel.Appearance and Structure: They have a hexagonal - shaped head, which is convenient for tightening and loosening with a hex wrench or spanner. The bolt is connected to the nut through threads, enabling the fixation of parts, and this connection is detachable.

Material and Performance:

Surface Treatment Principle:

Application Scenarios: 

Made of carbon steel, they have different strength grades, such as 4.8 - grade, 8.8 - grade, 10.9 - grade, and 12.9 - grade. Premium carbon steel materials endow them with certain corrosion - resistance and high - temperature - resistance, featuring high strength and good durability.

The blackened treatment, also known as bluing, is mainly to form a dense iron oxide film (mainly FeO) on the surface of the bolts through chemical or electrochemical methods. This film can isolate air and moisture, playing a role in rust prevention. At the same time, the black finish also has a certain aesthetic effect.

They are widely used in many industries, such as energy, electrical appliances, machinery, metallurgy, and construction. They can meet the fastening needs in different working conditions, whether in general mechanical equipment or some projects with higher strength requirements.

Packing & Delivery

Bag Packaging

Carton Packaging

Fasteners can be packaged in durable plastic bags, which are available in various sizes to accommodate different quantities (e.g., small batches of screws, nuts, or bolts). The bags are typically sealed by heat or with a zipper to prevent moisture, dust, and loss of contents. This method is lightweight, cost-effective, and suitable for retail sales, small shipments, or situations where easy access to the fasteners is needed. Additionally, clear plastic bags allow for quick visual identification of the products inside.

For larger quantities or bulk transportation, cartons are commonly used. These are sturdy cardboard boxes, often reinforced with corrugated layers to provide protection against impact during handling and shipping. Fasteners in cartons are usually pre-packed in bags or separated by dividers to avoid friction and damage. Cartons can be labeled with product details (e.g., type, size, quantity) and are stackable, optimizing storage and logistics efficiency. This method is ideal for industrial orders, wholesale distribution, or long-distance transportation where durability is a priority.

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.