Black Plated Square Nut, Widely Used in Steel Structures

• Customization: Available
• Material: High Strength Steel
• Type: Square Head
• Model NO.: GB/T 39-1988
• Connection: Common Bolt
• Head Style: Square
• Standard: DIN, GB
• Grade: 4.8
• Transport Package: Bag
• Specification: M3-M24
• Trademark: LING KE
• Origin: Yong Nian
• HS Code: 731816
• Production Capacity: 300000/Year
• Package Size: 30.00cm * 20.00cm * 20.00cm
• Package Gross Weight: 50.000kg

Product Description

Black - coated square nuts are a type of fastener with a square - shaped body.

Appearance and Structure: 

Surface Treatment:

Application Scenarios: 

Black - coated square nuts have four flat sides, which is different from the common hexagonal nuts. This square design provides a larger contact surface, making it less likely to slip during use, and can offer a more stable grip compared to hex nuts in some cases.

As the name implies, these nuts are coated with a black - colored layer. This coating is usually achieved through processes such as black oxide or black zinc electroplating. The black coating not only gives the nuts a unique appearance but also plays an important role in corrosion resistance.

Widely used in steel structures, machinery manufacturing, railway construction, agricultural equipment, machine tools, and industrial construction. For example, in steel structure projects, they are used to connect various steel components to ensure the stability and reliability of the structure.

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.