Nanpi Haokai Hardware Products Co., Ltd., strategically located near Bohai Sea and adjacent to the Beijing-Shanghai Expressway, has established itself as a leading professional manufacturer of custom metal components since 2000. Specializing in the design, development, and production of precision metal parts, our company serves diverse global industries including new energy, automotive, electrical appliances, medical equipment, instrumentation, and machinery manufacturing. With over two decades of continuous innovation and development, we’ve built a solid reputation for delivering high-quality, customized hardware solutions that meet international standards.
Core Manufacturing Capabilities
Our production facility spans over 3,000 square meters and houses advanced manufacturing equipment including 30 sets of 30-250 ton stamping machines, 30 CNC machining centers (including automatic lathes and Swiss-type CNC machines), and injection molding machines. This comprehensive equipment park enables us to handle projects ranging from single-piece prototypes to mass production runs with consistent quality.
The technical team comprising 16 engineers and 7 senior technicians brings combined expertise of over 100 years in metal processing. This technical strength allows us to implement complete production workflows from product design and tooling development to final assembly and quality inspection. Our integrated production system ensures seamless coordination between different manufacturing stages, reducing lead times while maintaining strict quality control.
Quality assurance forms the cornerstone of our operations. We’ve implemented and maintain ISO 9001:2015 quality management system certification across all production processes. From raw material inspection to final product testing, each component undergoes multiple quality checks using advanced measuring equipment including CMM coordinate measuring machines and optical projectors. This rigorous quality control ensures our products consistently meet or exceed customer specifications.
Main Product Lines
Our product portfolio focuses on three core categories of custom metal components, each designed to meet specific industry requirements:
1. Precision Stamping Components
Our stamping capabilities range from simple flat parts to complex three-dimensional components with thickness from 0.1mm to 10mm. The metal shovel series represents our advanced stamping technology – produced from single metal sheets through progressive die stamping, these components feature integral reinforcement ribs and smooth curved surfaces without any welds or joints. This design ensures exceptional strength and durability while eliminating potential failure points.
The brass stretch copper shell series demonstrates our precision deep drawing capabilities. Manufactured through multi-stage drawing processes, these seamless components achieve dimensional accuracy within ±0.05mm and maintain consistent wall thickness. The surface finish reaches Ra0.8μm after polishing, making them ideal for high-precision electrical connections in aviation and new energy applications.
2. CNC Machined Components
Our CNC machining department specializes in producing complex metal parts with tolerance control within ±0.01mm. The brass connecting rod series exemplifies our precision machining capabilities – manufactured from solid brass bars through multi-axis CNC turning and milling, these components feature precise dimensional control and mirror-like surface finish (Ra0.4μm) without any burrs or tool marks.
The precision knurled zinc-plated sleeve series showcases our advanced turning technology. Produced through single-point diamond turning, these components achieve concentricity within 0.02mm and cylindrical runout below 0.01mm. The knurled surface pattern provides excellent friction grip while maintaining smooth rotational movement, making them ideal for mechanical positioning applications.
For demanding applications, we offer comprehensive material options including various copper alloys, stainless steel, aluminum alloys, and engineering plastics. Our surface treatment capabilities range from standard zinc plating to specialized coatings like gold plating, silver plating, and passivation treatments that enhance corrosion resistance and electrical conductivity.
3. Custom Injection Molded Parts
Our injection molding department serves customers requiring precision plastic components with metal inserts or over-molded features. We work with engineering plastics including POM, PA66, PBT, and PEI to produce parts with complex geometries and tight tolerances. The standard elastic clip series demonstrates our molding expertise – these components achieve consistent clamping force through precise control of material flow and cooling rates during molding.
For applications requiring combined metal-plastic properties, we offer insert molding services that securely embed metal components within plastic housings. This process ensures permanent bonding between different materials while maintaining dimensional accuracy of critical features. Our molding capabilities support part weights from 0.5g to 2kg with shot sizes up to 1,000 grams.
| Product Category | Material Options | Typical Tolerance | Surface Treatments |
|---|---|---|---|
| Precision Stamping | Cold rolled steel, stainless steel, brass, aluminum, copper | ±0.05mm | Zinc plating, nickel plating, chrome plating, anodizing, passivation |
| CNC Machining | Brass, phosphor bronze, stainless steel, aluminum alloy, PEEK | ±0.01mm | Polishing, brushing, anodizing, hard coating, gold/silver plating |
| Injection Molding | POM, PA66, PBT, ABS, PC, PEI | ±0.1mm | Painting, pad printing, laser etching, EMI shielding |
Customization Capabilities
Understanding that different applications require unique solutions, we’ve developed comprehensive customization capabilities across all product lines. Our engineering team works closely with customers during the initial design phase to optimize part geometry for manufacturability while maintaining functional requirements. This collaborative approach often results in cost savings through material reduction or simplified production processes.
For stamping components, we offer progressive die design services that can combine multiple operations into single stamping sequences, reducing production costs for high-volume parts. Our CNC machining department provides DFM (Design for Manufacturing) analysis to identify potential machining challenges early in the development cycle, preventing costly modifications during production.
Material selection plays critical role in component performance. We maintain an extensive material library and work with certified suppliers to source specialized alloys and engineering plastics. Our material experts provide guidance on selecting appropriate materials based on application requirements such as mechanical strength, corrosion resistance, thermal conductivity, or electrical properties.
Surface treatment customization helps components meet specific environmental or functional requirements. In addition to standard finishes, we offer specialized coatings like Parylene for medical applications, trivalent chromium plating for RoHS compliance, or conductive coatings for EMI shielding. Our in-house plating lines ensure complete control over the finishing process and consistent quality across production batches.
Industry Applications
Our components serve critical functions across multiple industries:
Automotive Industry: We supply precision stamping parts for battery connectors in electric vehicles, CNC machined components for engine management systems, and injection molded parts for interior trim. Our components withstand harsh automotive environments while maintaining reliable performance over vehicle lifetimes.
Medical Devices: For medical instrumentation, we produce CNC machined components with biocompatible surface treatments and precision stamping parts for disposable devices. Our cleanroom-compatible production processes meet stringent medical industry requirements for cleanliness and traceability.
New Energy Sector: Our brass connection components play vital roles in solar inverters and wind turbine control systems. The high conductivity and corrosion resistance of these components ensure reliable power transmission in renewable energy installations.
Electrical Appliances: We supply standard elastic clips for appliance assembly lines and precision stamping parts for motor components. Our components help major appliance manufacturers improve production efficiency while maintaining product quality.
FAQ
What materials can you use for custom connection components?
We work with a comprehensive range of materials including various copper alloys (brass, phosphor bronze, beryllium copper), stainless steel grades (304, 316, 430), aluminum alloys (6061, 7075), cold rolled steel, and engineering plastics (POM, PA66, PBT). For specialized applications, we can source exotic materials like titanium, Inconel, or PEEK based on customer requirements.
How do you ensure dimensional accuracy for CNC machined components?
Our quality control system implements multiple inspection stages: raw material verification, in-process inspection using digital calipers and micrometers, and final inspection with CMM coordinate measuring machines. For critical dimensions, we perform 100% inspection and maintain statistical process control charts to monitor production stability.
What is your minimum order quantity for custom parts?
We accommodate both prototype development and mass production. For new custom parts, we recommend starting with 50-100 pieces for initial testing. Once designs are validated, our stamping production lines can efficiently handle orders from 1,000 to several million pieces. CNC machining orders typically start at 10 pieces for small batches up to 10,000+ pieces for larger runs.
How do you handle design modifications during production?
Our engineering team reviews all design changes through formal ECN (Engineering Change Notice) procedures. For minor modifications, we can often implement changes without affecting production schedules. Major changes may require updated tooling or fixtures, which we coordinate with customers to minimize impact on delivery timelines.
Summary
Nanpi Haokai Hardware stands as a trusted partner for global manufacturers requiring precision metal components. With two decades of expertise in stamping, CNC machining, and injection molding, we deliver customized solutions that meet the most demanding specifications. Our ISO 9001:2015 certified processes, advanced manufacturing equipment, and experienced technical team ensure consistent quality across all production runs. From initial design consultation to final delivery, we provide comprehensive support to help customers optimize their supply chains and improve product performance. Contact us today to discuss how we can support your next project with our custom connection component solutions.