Zinc-Plated Hardened 12L14 Self-Clinching Insert - CNC Auto Parts
Material: carbon steel/ 12L14
Heat treatment: Harden
Plating: Zinc
Characteristics: Which use the proven self-clinching design, install with a squeeze in punched or drilled round holes - and become permanently mounted in the sheet.
Customer location: Singapore
Applied industry: Electronics
Our products are sourced by BMW, Ford and Bosch OEM/ODM services | 24-hour response time | ISO 9001:2015-certified Operating since 2006 ShenZhen MaiJin Metal Works Co., Ltd. was founded in 2006. We have built up a good reputation
Product advantages
Crafted by a specialist CNC auto-parts manufacturer from hardened 12L14 steel and zinc-plated for corrosion resistance, this self-clinching insert is produced with tight tolerances for consistent fit and long service life. Its self-clinching design locks securely into thin sheet metal to provide permanent, load-bearing internal threads that simplify assembly and reduce rework in automotive and industrial applications. Key advantages include high hardness and wear resistance, excellent torque and pull-out strength, compatibility with standard installation tools, and reliable performance in harsh environments.
Team strength
Our dedicated engineering and production team brings deep expertise in CNC machining, metallurgy, and precision assembly to deliver zinc-plated, hardened 12L14 self-clinching inserts tailored for automotive applications. We combine ISO-certified quality control, heat-treat and plating know-how, and in-line inspection to ensure consistent hardness, tight tolerances, and reliable clinching performance. Collaborative R&D and fast prototyping shorten development cycles; responsive customer service and supply-chain management guarantee on-time delivery and scalable volume production. The result is a robust, low-maintenance fastening solution that reduces assembly time, increases joint strength, and minimizes warranty risk for OEMs and contract manufacturers while ensuring cost-effective long-term performance reliability.
Why choose us
Our cross-functional engineering and production team combines decades of precision fastener experience with specialized expertise in CNC machining, heat treatment, and zinc plating of 12L14 steel to manufacture hardened self‑clinching inserts. Core strengths include process-controlled turning, thread rolling, rigorous in-line inspection, and assembly-ready packaging. Value-driven practices ensure consistent hardness, corrosion resistance, tight tolerances, and rapid prototyping for OEM applications. Dedicated quality engineers, sourcing specialists, and customer support deliver on-time shipment, custom specifications, and traceable material certification. Collaborative R&D shortens development cycles while volume scalability and lean manufacturing reduce costs—providing dependable, high-performance inserts that enhance joint reliability in demanding automotive assemblies.
Shenzhen Maijin Metal is globally oriented and has established business contacts with enterprises in more than 30 countries. Small parts have big uses. Machining parts are widely used in various industries, especially 5G, AI, new energy vehicles, industrial automation and so on. We have built up a good reputation for quality, service and reliability. With highly trained our sales people, experienced technical sales engineers and customer focus management systems, we have achieved the stable sales record at the forefront of our industry in providing high quality products and services to our customers. Place quality at first. Moving towards to perfect quality, accumulating every little improvement. This is our Chinese name origin and also our purpose in believing quality to be first. To keep improving the quality at the same time to optimize the processing technology so as to make our products to be more competitive in the market.
What industries do you serve?
We are involved with almost every industry imaginable. We serve 5G, AI, aerospace, energy, medical, dental, and many others.
What is the smallest part you can make? What is the largest part you can make?
The short answer is “it depends.” Things like your needs, part complexity, the type of manufacturing, and many other factors are at play. In general, we can machine parts with minor outside diameters (ODs) as small as 2mm (0.080”) and major ODs as large as 200mm (8”). If you’re looking for help nailing down those factors, we encourage you to contact our technical sales staff early in the design cycle so we can review your part and provide insight and assistance.
What's the difference between a lathe, a screw machine, a truning center, and a CNC lathe?
In its simplest form, a lathe is a machine that can make turned parts from bar stock, but has no milling capability. Screw machines, turning centers, and CNC lathes are lathes that have the ability to turn and mill parts. Turning centers and Swiss lathes can typically make more complicated parts than screw machines, and are better-suited for parts with tight engineering tolerances. Swiss lathes tend to be better for small, thin, and long parts than screw machines and turning centers.
We have achieved the stable sales record at the forefront of our industry in providing high quality products and services to our customers.
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Contact Details
Tel / Whatsapp: +8613632562601
Email: mj@chinamaijin.com
Add: 10F, 9 Building Block B, Bao Neng Science and Technology Park, NO.1 Qing Xiang Rd, Long Hua District, Shen Zhen City, China.