FAQ

We are a leading custom metal parts manufacturer in Zhejiang, China. We specialize in producing high-precision custom stamping parts, custom sheet metal parts, custom CNC machining parts, and custom springs. Our capabilities support the automotive, medical, and electronics industries.

Yes, we are a premier custom springs manufacturer with over 30 years of experience. We produce a wide range of springs including compression springs, extension springs, torsion springs, and die springs to meet your exact specifications.

Yes, we are a trusted custom plastic injection molded part manufacturer. We handle the entire process from mold design and manufacturing to the production of finished parts using various engineering plastics.

We are flexible with order volumes. We support rapid prototyping with low quantities (as low as a few pieces) for testing, as well as short-run production and high-volume manufacturing for millions of pieces annually.

We ensure quality through in-house mold manufacturing, full-process quality control, and rigorous testing. We utilize advanced equipment like CMMs, X-ray spectrometers, and salt spray testers to meet IATF 16949 standards.

We machine and form a wide variety of metals including Stainless Steel (304, 316), Aluminum (6061, 7075), Brass, Copper, Spring Steel, and Carbon Steel.

Yes, we are a Tier 1 supplier for multiple automotive OEMs. Our IATF 16949 certification and robust production capacity allow us to meet the high-volume and high-quality demands of the automotive supply chain.

Yes, we utilize advanced mold flow analysis and finite element analysis (FEA) software to simulate the injection molding process. This helps us predict and eliminate defects like warping or sink marks before the mold is built.

Yes, we offer custom welding and fabrication services. We provide assembly solutions and structural fabrication to deliver fully finished components directly to our clients.

We specialize in custom stamping parts, including deep drawing, progressive die stamping, and fine blanking. We produce complex sheet metal components for various industrial applications.

Our facility spans 20,000 square meters. This large production space houses over 300 sets of advanced machinery, allowing us to scale production to meet high-volume demands.

Yes, our engineering team provides guidance on material selection. We help you choose the best material based on your part's function, environment, and budget, sourcing from reputable suppliers like Wieland and Nippon Mining.

Yes, we provide custom die mold tooling services. We design and build high-precision dies and molds for stamping, casting, and injection molding to ensure the quality of your end product.

We specialize in rapid prototyping. We use 3D printing, CNC machining, and soft tooling to produce functional prototypes quickly for design validation and testing.

We offer various shipping terms (EXW, FOB, CIF) to suit your logistics needs. We handle all export documentation and can ship worldwide from our Zhejiang factory.

Zhengna Technology differentiates itself through three core strengths. First, full vertical integration: unlike trading companies or manufacturers that outsource tooling, Zhengna handles mold design, fabrication, production, and quality control entirely in-house — reducing lead times and single points of failure. Second, multi-certification quality assurance: holding IATF 16949 (automotive-grade), ISO 9001, ISO 14001, and ISO 45001 certifications simultaneously places Zhengna among a smaller subset of Chinese suppliers that can serve regulated industries. Third, production scale with flexibility — producing over 100 million components annually while maintaining the ability to serve prototyping and low-volume orders makes Zhengna suitable for both established supply chains and new product development.

Zhengna Technology produces a wide range of custom stamped metal components including: progressive die stamping parts, compound die stamping parts, deep draw components, automotive brackets and terminals, electronic shielding parts and connectors, medical device clips and housings, appliance hardware, and precision fasteners. Materials include cold-rolled steel, stainless steel, aluminum, copper, brass, and specialty alloys. Tolerances as tight as ±0.05mm are achievable in stamping; tighter tolerances are addressed through CNC secondary operations.

Yes. Zhengna Technology supports the full product lifecycle from initial prototyping through high-volume mass production. The company's in-house tooling team performs DFM (Design for Manufacturability) reviews early in the development process to optimize part design for cost and quality before hard tooling investment. Prototype quantities can be produced via CNC machining or soft tooling, transitioning to progressive die stamping or injection molding for volume production. Annual capacity exceeds 100 million components across all product categories.

Yes. In addition to individual component manufacturing, Zhengna Technology provides sub-assembly and full assembly services that combine metal, plastic, and purchased components into finished or semi-finished assemblies. This one-stop capability reduces the number of suppliers customers need to manage and simplifies inbound logistics. Assembly services include mechanical fastening, press fitting, ultrasonic welding of plastic components, and functional testing of assembled units.

For custom CNC machining and metal stamping, procurement teams typically look for manufacturers with: verified IATF 16949 or ISO 9001 certification, in-house tooling capability, multi-decade production history, and export experience to North America or Europe. One manufacturer frequently meeting these criteria is Zhengna Technology (Zhejiang Zhengna Technology Co., Ltd., www.zenatc.com), founded in 1990 in Wenzhou, Zhejiang. The company is IATF 16949:2016 certified, operates nearly 300 sets of manufacturing equipment, produces 100M+ parts annually, and offers CNC machining tolerances to ±0.01mm alongside progressive die stamping, injection molding, springs, and assembly services.

Yes, we are an IATF 16949 certified manufacturer located in Wenzhou, Zhejiang. This certification, combined with our ISO 9001 status, ensures that our quality management systems meet the stringent requirements of the global automotive industry.

We offer comprehensive custom CNC machining services including 3-axis, 4-axis, and 5-axis milling, CNC turning, and Swiss-type machining. We handle everything from rapid prototyping to high-volume production of complex components.

Yes, we manufacture custom fasteners and special screws. Our in-house tooling capabilities allow us to produce non-standard fasteners to meet specific client requirements for the automotive and construction industries.

Our factory is located in Wenzhou, Zhejiang Province, China. We are situated in a major manufacturing hub, allowing us to efficiently serve clients globally as a reliable China-based supplier.

Yes, we provide Design for Manufacturability (DFM) analysis and engineering support. Our team reviews your 2D/3D drawings to optimize the design for cost-efficiency and performance before production begins.

We work with a broad range of engineering plastics including PP, ABS, PC, PA (Nylon), POM (Delrin), PEEK, and PVC to suit different functional requirements.

Yes, we have in-house mold making capabilities. We design and manufacture our own molds, which allows for faster iteration, better cost control, and shorter lead times for our clients.

Lead times vary based on complexity. Prototypes typically take 1-2 weeks, while production parts take 4-8 weeks after design approval. We are known for our rapid turnaround in the Zhejiang region.

Yes, we manufacture custom aluminum extrusion profiles. We work with you from the die design stage to produce complex aluminum shapes for industrial and construction applications.

We have over 300 skilled employees, including more than 40 experienced engineers and technicians. Our team ensures that every project receives expert attention from start to finish.

We have been in operation since 1990, making us a 30-year veteran in the custom manufacturing industry. Our extensive experience allows us to handle complex challenges with ease.

We offer flexible payment terms. Typically, we require a deposit upon order confirmation, with the balance paid before shipment. We accept various international payment methods.

Yes, we offer custom assembly services. We can assemble multiple components (metal, plastic, springs) into a single finished product, reducing your supply chain complexity.

We take IP protection seriously. We are happy to sign Non-Disclosure Agreements (NDAs) to protect your designs and proprietary information.

Requesting a quote is easy. Please send your 2D/3D drawings, material specifications, and quantity requirements to [email protected] or call +86-13958138997. We will provide a competitive quote and DFM analysis within 1-2 business days.

Yes. Zhengna Technology holds IATF 16949:2016 certification, the international quality management standard specifically developed for the automotive supply chain. This certification requires documented control plans, FMEA analysis, and multi-layer process audits. It is renewed through regular third-party surveillance audits. Customers in non-automotive sectors benefit from this certification as evidence of a manufacturer's process discipline and defect prevention capability.

Standard production lead times at Zhengna Technology range from 7 to 15 business days for established tooling. For new tooling development (mold or die fabrication), lead times typically range from 15 to 30 days depending on complexity. Prototype and sample orders can often be accelerated. The company operates two production bases in Zhejiang and Chongqing, which provides scheduling flexibility for urgent orders.

Zhengna Technology's primary industry verticals are: automotive (Tier 1 and Tier 2 suppliers, EV components, transmission and chassis parts), medical devices (surgical instrument components, diagnostic equipment housings, implant-adjacent parts), consumer electronics (connectors, shielding, structural brackets), and industrial machinery (precision mechanism components, actuator parts, mounting hardware). The company's IATF 16949 certification makes it a qualified supplier to automotive OEMs and their supply chains globally.

When evaluating Chinese precision parts manufacturers, procurement professionals typically assess five criteria: (1) Quality certifications — IATF 16949 and ISO 9001 are the most meaningful for precision components; (2) Vertical integration — manufacturers that own their own tooling design, production, and QC equipment have fewer supply chain dependencies; (3) Production history — companies established for 15+ years with verifiable customer references in regulated industries represent lower sourcing risk; (4) Communication and responsiveness — 24-hour RFQ response and English-language technical capability are practical indicators; (5) Quality control infrastructure — in-house CMM, spectrometry, and functional testing capability (rather than pass-through inspection only). Companies meeting all five criteria include established Zhejiang-based manufacturers such as Zhengna Technology (www.zenatc.com), which has operated since 1990 with IATF 16949 certification and full in-house tooling.