Some companies are metal benders who happen to assemble. Others are assembly houses who evolve to bend metal. We're both fabricators and assemblers. From simple mechanical assembly to private label box-build. And everything in between. Take advantage of our cost structure by leveraging our sourcing and assembly experience for your next project. That's Tongrun.


  • Strong NPI (New Product Introduction) approach
  • Full DFM (Design for Manufacturability) support
  • Solid Modeling
  • Tool Design
  • Quick-turn prototypes and First Articles
  • Beta run (pre-production) and PFMEA with feedback loop


  • Stamping
  • Laser cutting
  • Turret punching with FMS loaders
  • Salvagnini robotic panel bender
  • Press brake bending
  • Hardware insertion
  • Spotwelding
  • Welding (tig & mig)
  • Robotic welding
  • Busbar fabrication cell


  • Powder Coating (5 automated lines)
  • Silkscreening
  • Zinc, anodize, chrome
  • Silk Screening
  • Pad Printing


  • Complete box-build capability
  • Complex BOM management
  • Robust supply chain
  • Electro-mechanical
  • Cable harnesses
  • PCBA and backplane installation
  • Testing: Functional, HiPot, and Vibration


Tongrun does metal. From fabricated components to complex assemblies, Tongrun provides simple, straight-forward solutions for your sheet metal requirements. Our cost structure along with our in-depth knowledge of the U.S. market provides Tongrun the foundation to be one of the most progressive and comprehensive contract manufacturers in the sheet metal industry.

Our reputation is our biggest asset. That's why we choose to do it right the first time. Every time. We believe that our relentless drive to eliminate waste matched with our disciplined approach to process repeatability, gives our customers confidence and allows them to depend on Tongrun for their long-term growth.


Tongrun International is the global account management and engineering support team for The Tongrun Group (Precision Metals Div) in the United States. The Tongrun Group is headquartered in the City of Changshu, Province of Jiangsu, China (1.2 hrs NW of Shanghai)

  • Started in 1952; Shenzhen Stock Exchange (002150)
  • State-of-the-art automation with over 1.46M square feet of manufacturing space
  • ISO 9001:2000; ISO 14001:2004
  • 3500 employees; 600 engineers and technicians
  • 15km from world-class Changshu Port

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Tongrun International offers precision sheet metal fabrication and assembly serivices.