The fastener market for new energy vehicles is rapidly upgrading towards higher strength, lighter weight, more specialized functions, and intelligent manufacturing. The market size continues to expand, and the process of domestic substitution is accelerating significantly.
Rapid Market Growth
According to industry forecasts, the market size of dedicated fasteners for new energy vehicles in China will exceed 36.5 billion yuan in 2026, with a compound annual growth rate of 25%–30%.
Dedicated fasteners for the three-electric system (battery, motor, and electronic control) have become the core growth engine, with demand growth exceeding 40%.
High-strength (grade 12.9 and above) fasteners already account for 58% of the application in new energy vehicles, and this is expected to exceed 75% by 2027.
Four Major Technological Trends Leading the Upgrade
High Strength: The Cornerstone of Safe Connections
12.9 and 14.9 grade ultra-high strength alloy steel bolts are widely used in key components such as the chassis and battery packs of new energy vehicles. These bolts have a tensile strength of no less than 1200MPa, effectively coping with complex stresses and high-frequency vibrations.
Domestic companies have achieved import substitution through material upgrades (such as SCM435 and SAE4140) and advanced heat treatment processes, keeping product defect rates below 0.8%.
Lightweighting: A Key Path to Reducing Weight and Improving Range
Aluminum Alloy Fasteners: Weighing only 30% of steel components, used in battery pack frames and body panels.
Titanium Alloy/Composite Material Fasteners: Reducing weight by 40%–60%, used in core structures of high-end vehicles.
High-Performance Stainless Steel: Balancing weight reduction with resistance to electrochemical corrosion, suitable for complex operating conditions.
The application rate of lightweight fasteners jumped from 28% in 2024 to 41% in 2025.
Functional Specialization: Adapting to the Special Needs of "Three-Electric" Systems
Battery System: CTP/CTC battery pack connecting bolts must possess long-life corrosion resistance, shock resistance, and sealing properties; insulating bolts prevent leakage.
Electric Drive/High Voltage System: Precise torque control is required for copper-aluminum busbar connecting bolts to ensure low contact resistance and prevent overheating.
Thermal Management System: High-precision sealing is emphasized for liquid-cooled plate joint fasteners to prevent coolant leakage.
Anti-loosening Design: All-metal lock nuts and pre-applied adhesive screws are standard in the chassis and suspension systems.
Smart Manufacturing: The Core Support for Quality and Efficiency Improvement. The widespread adoption of technologies such as MES systems, AI visual inspection, industrial robots, and digital twins has led to a 30%–40% increase in production efficiency after smart factory transformations by leading companies, alleviating the contradiction of "insufficient high-end production capacity."
