Tel: 86-157-9948-7210 

WhatsApp: 8615799487210

E-Mail: jasmin@zwspring.com

Address: East of Chaihudian Town, Ningjin County, Dezhou City, Shandong Province, within the industrial park

Custom Precision Extension Springs | Factory Direct Custom Metal Spring Manufacturer
If you are searching for reliable custom extension springs, precision tension springs, S-type hook springs and special-shaped wire forming springs for industrial, automotive, furniture, machinery and household equipment applications, our professional spring manufacturing factory delivers high-performance, tailor-made spring solutions to meet your unique technical and bulk order demands. As a leading Chinese custom spring supplier with years of production experience, we specialize in designing and manufacturing all types of metal tension springs, custom hook extension springs, shaped wire springs, small precision springs and hardware spring fittings, supporting one-stop OEM & ODM customization with factory-direct competitive pricing, no middleman markup to help you cut procurement costs significantly.

Premium Product Features & Core Advantages of Our Custom Extension Springs
Our entire range of custom metal extension springs is crafted from high-grade raw materials including 65Mn spring steel, stainless steel 304, 316, music wire and galvanized carbon steel, ensuring outstanding tensile strength, fatigue resistance, anti-rust performance and long service life even under high-frequency repeated stretching, high-temperature, humid and corrosive working environments. Unlike ordinary low-cost springs on the market, every tension spring we produce undergoes strict heat treatment, quenching and surface anti-corrosion processes such as galvanization, nickel plating, powder coating and black oxide finishing, effectively preventing rust, deformation and spring fatigue fracture during long-term continuous use, drastically reducing your equipment maintenance and replacement costs.
We support fully personalized customization covering wire diameter from 0.1mm to 12mm, inner diameter, free length, initial tension, hook style, pulling force parameters and surface treatment options. Our hook designs include standard double hook, cross hook, S hook, swivel hook, straight hook, side hook and special-shaped bending hooks as shown in our product gallery. Whether you need tiny miniature precision extension springs for electronic devices, medium-sized tension springs for fitness equipment, furniture, door locks, agricultural machinery, or heavy-duty industrial tension springs for construction, automotive and engineering machinery, we can precisely replicate your samples or convert your technical drawings into qualified finished springs. All custom springs are strictly inspected via tensile testing, fatigue cycle testing, dimension tolerance inspection and salt spray anti-corrosion testing before delivery, guaranteeing consistent product stability and batch uniformity to avoid defective parts affecting your finished product quality.

Powerful Factory Strength to Secure Your Bulk & Custom Order Cooperation
Located in Shandong Province, our modern spring production workshop is equipped with fully automatic CNC spring coiling machines, multi-axis wire bending forming equipment, automatic heat treatment furnaces and professional precision testing laboratories, enabling us to handle both small-batch prototype custom orders and large-volume mass production orders efficiently. Our professional production team has rich experience in spring structural optimization design; we can provide free technical consultation, spring force parameter calculation, structural improvement suggestions and customized solution design to help you optimize your spring part structure, save raw material costs and enhance the service life of your end equipment.
We adopt standardized production management and complete quality control systems, strictly implementing ISO production specifications to ensure every batch of springs complies with international industrial hardware quality standards. We offer flexible trade terms, fast production lead times, strict order progress tracking and secure export packaging to prevent product extrusion, deformation and rust during international long-distance transportation. Whether you are an industrial distributor, hardware wholesaler, machinery manufacturer, furniture factory, automotive parts supplier or cross-border e-commerce seller from North America, Europe, Southeast Asia, Australia and other global regions, our factory-direct sales model eliminates intermediate distributors, allowing you to obtain high-quality custom tension springs at highly competitive factory wholesale prices.
We provide one-stop customized service from drawing confirmation, sample trial production, formal mass production to global logistics delivery. If you cannot find standard spring products matching your working conditions on the market, send us your detailed technical parameters, design drawings or physical samples, and our professional R&D team will quickly complete sample development within 3-7 working days. From small custom prototype orders to large-scale bulk procurement, we always adhere to strict quality control, stable delivery schedules and thoughtful after-sales technical support, aiming to become your most trusted long-term custom metal spring partner in China.