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Covers core components of traditional fuel vehicles and new energy vehicles, including precision screws for engine blocks and transmission housings, connecting parts for chassis suspensions and steering systems, fixing bolts for new energy vehicle battery packs (including module fixing and case sealing), as well as fixing screws for electronic components such as sensors and ECUs (Electronic Control Units).
Such fasteners must adapt to severe working conditions including high-frequency vibration, high-low temperature cycles, humidity and corrosion, while meeting the efficiency requirements of mass production.
Core Production Characteristics
High-Strength Performance Control
Core fasteners require excellent tensile strength, torsional strength and fatigue resistance to withstand high-frequency vibration and alternating loads during vehicle operation, avoiding failures such as loosening and fracture. High-strength alloy steels (e.g., Grade 10.9, Grade 12.9 bolt steel) and optimized heat treatment (quenching + tempering) are applied to ensure mechanical properties, while fatigue testing verifies service life.
Consistency Assurance for Mass Production
The automotive industry demands a large quantity of fasteners (hundreds per vehicle), requiring stable, high-precision mass production. Automated production lines including automatic feeding, CNC machining, automatic inspection and automatic packaging are adopted to reduce manual intervention, control dimensional deviations, ensure consistency in dimensions and performance across batches, improve vehicle assembly efficiency and lower assembly failure rates.
Customized and Lightweight Production
According to installation space and functional requirements of automotive components, customized products are provided with non-standard threads, flange faces (no extra washers needed, improving assembly efficiency) and anti-loosening structures (e.g., nylon locking, serrated locking).
In response to automotive lightweight trends, lightweight materials such as aluminum alloy and titanium alloy are used. Precision forging, cold heading and other processes reduce weight while maintaining strength, supporting extended cruising range for new energy vehicles.
Special Requirements for New Energy Vehicles
Battery pack fasteners are critical safety components for new energy vehicles. They must bear battery pack weight, driving vibration and temperature changes from battery heating, with torque requirements exceeding 200 N·m, plus good insulation and corrosion resistance.
High-strength alloy materials and optimized structural design (e.g., enlarged thread profiles, enhanced anti-loosening structures) are used. Torque accuracy is strictly controlled, and surface insulation treatment is applied to prevent battery short-circuit risks.
General Core Characteristics of CNC Machined Screws
Ultra-high precision: Standard tolerance ±0.01 mm, precision version up to ±0.001 mm, with precise, clearance-free thread fitting.
Strong consistency: Program-controlled, highly uniform dimensions, geometric form and surface quality in batches.
Flexible customization: No mold required, fast switching for non-standard pitches, special heads, multi-step shapes and special slot types.
Wide material compatibility: Capable of machining stainless steel, titanium alloy, aluminum alloy, copper alloy, high-temperature alloy, etc.
Flexible efficiency & batch size: Suitable for small-batch prototyping and medium-batch customization, with fast switching between single-piece and multi-variety production.
CNC Machined Screws vs. Traditional Screws (Thread Rolling / Cold Heading)
Comparison Item
CNC Machined Screws
Traditional Thread Rolling / Cold Heading Screws
Precision
Ultra-high (±0.001~±0.01 mm)
General (±0.05~±0.1 mm)
Customization
Extremely strong (non-standard / special / complex structures)
We have introduced advanced equipment and technology from Japan and Germany (CNC 5-axis and 6-axis machines) to better serve our customers' needs.
Our maximum processing outer diameter is 60, and the minimum control tolerance is 0.001. We have Japanese CNC Tsugami, CNC Citizen, multi-station cold extrusion forming machines, 500T press machines, casting equipment, and various process equipment, which can effectively provide customers with the best technical solutions.
Our company has a total of 300 employees, including 20 technicians, 10 engineers, and 15 quality control personnel. We have over 300 pieces of equipment.
Our company implements 8S management and has passed ISO9001 and TS16949 automotive certifications.
Our customers include , bo-sch, Foxconn, Motors, Husqvarna, Shimano, NVIDIA, DJI Drones, Siegenia, and Cater-pillar.