Black Oxide Zinc Hex Socket Bolts, low-profile countersunk head, auto parts

Combining a low-profile countersunk head with a secure hex socket drive and a durable black finish, these fasteners offer both aesthetic appeal and reliable performance.

Key Advantages for Your Applications:

• Seamless Integration & Aesthetics: The countersunk (CSK) flat head sits flush with the surface, providing a clean, smooth finish that enhances the overall appearance and prevents snagging.

• Secure & Reliable Fastening: The internal hex socket drive allows for high torque transfer, minimizing cam-out and ensuring a positive engagement for secure, stable connections.

• Enhanced Durability & Appearance: The Black Oxide Zinc finish provides good corrosion resistance and a sleek, non-reflective black aesthetic, ideal for applications where appearance matters.

• Versatile Material & Strength Options: Available in a wide range of materials (Carbon Steel, Alloy Steel, Stainless Steel) and strength grades (from 4.8 to 12.9, A2/A4 series) to meet diverse load-bearing and environmental requirements.

• Global Standard Compliance: Produced according to various international standards including DIN, GB, UNC, BSW, JIS, etc., facilitating seamless integration into your global designs and supply chains.

• Direct Manufacturer Advantage: Sourcing directly from us ensures transparent processes, flexible responsiveness, competitive pricing, and access to our professional expertise in fastener selection and optimization.

• Reliable Supply Chain: We maintain a large inventory for popular specifications and possess strong production capacity and reliable logistics partners to guarantee timely and accurate delivery of your orders.

Ideal for:

• Machinery & Equipment Assembly: Securing components where a flush, clean finish and reliable internal drive are required.

• Electronic Enclosures & Devices: Fastening covers and internal components with a discreet and aesthetically pleasing solution.

• Furniture & Fixtures: Providing a high-quality, flush fastening point for modern and traditional designs.

• Sheet Metal Fabrication: Ideal for use in countersunk holes to create a smooth surface.

• Automotive Interiors & Trim: Providing secure, low-profile fastening for interior panels and components, potentially matching dark finishes.

• Precision Instruments: Requiring accurate and flush component assembly.

• Applications Requiring a Low-Profile Head: Where space is limited or protrusions must be avoided.

Serving the Global Automotive Industry Since 1986

Founded in 1986, Zhejiang Zhongrui Auto Parts Co., Ltd. has grown into a trusted global supplier for the automotive industry. With our origins in Tangxia, Ruian, renowned as the "Auto Parts Capital of China," and now operating from a modern, strategically located facility in Jiaxing City, Zhejiang, we partner with automotive brands worldwide. Our mission is to leverage our over 38 years of deep industry experience as a direct manufacturer to understand their unique engineering and supply chain challenges, and deliver intelligent, efficient, and reliable fastener and component solutions.

Comprehensive Fastener & Component Solutions for Automotive Production & Aftermarket

Zhejiang Zhongrui specializes in the streamlined supply of high-quality Automotive Fasteners, C-Parts, Kits, and Assemblies. As a direct manufacturer with a substantial scale – encompassing a total area of 36,237 square meters and a factory area of 20,000 square meters, backed by 130 million RMB in fixed assets – we provide transparent processes and highly flexible responsiveness. This direct approach significantly helps our clients reduce costs, shorten lead times, and minimize supply chain complexity while ensuring seamless and reliable procurement. We are proud to be an IATF 16949 certified manufacturer, committed to exceptional product quality and understanding the diverse needs of our customers in both OEM production lines and the automotive aftermarket. With Zhejiang Zhongrui, you gain a stable supply chain partner with significant capacity and decades of manufacturing expertise.