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High Torque Industrial High Quality 316 304 Stainless Steel Extension Coil Double Hook Tension Spring 0~5000N Load Capacity
With 30 Years of Spring R&D and Manufacturing Experience, HENP Boasts:
① Advanced Equipment Imported from Japan, Germany, and Taiwan, Including 28 Sets of CNC Forming Machines and End Grinding Machines;
② A Team of Well-Trained and Skilled Engineers and Technicians with Years of Industry Experience;
③ Strict Quality Control Backed by 4 Sets of Testing Equipment Like Torsion Testers and Digital Tensile-Compressive Testers;
④ International Certifications Such as ISO 9001:2008, NSF-ISR, RoHS, and PONY, Ensuring Reliable Products for Global Customers.
Contact: +86-19236804318 | [email protected]Extension Coil Double Hook Tension Spring
1· High Tension & Precision: Maintains consistent tension and elongation under repeated stress, delivering reliable elasticity and tensile resistance.
2· Durable Materials: Typically crafted from high-carbon steel, stainless steel (e.g., 304), or spring steel. Stainless steel variants offer excellent corrosion resistance.
- Overview
- Focus on Double Hook Tension Spring Production
- Recommended Products
Our products can be widely used in automobiles, motorcycles, electronics, machinery, recreation and sports appliance, equipment, toys and so on. The full line of online spring ranges from compression springs, extension springs, torsion springs, wire forms, stamping parts and other hardware fitting. In order to meet all requirements of customers, we can offer domestic and imported raw material, like spring steel, high carbon steel, alloy steel, stainless steel, etc. The surface treatment of spring ranges from Black oxide, Backing varnish, Zinc-plating, Nickel-plating, Chrome-plating, etc.
Technical Specifications & Applications
Specifications typically include customizable wire diameters (e.g., 0.3mm - 6.0mm), with free length and load capacity tailored per application. Standard models often operate in temperatures up to 250°C.
These springs are widely used in:
1· Automotive: Door mechanisms, throttle return springs, and hood latches.
2· Industrial Machinery: Conveyor systems, levers, and assembly equipment.
3· General Hardware: Garage doors, latches, and tension-based mechanisms.
Complete product data
How to order?
Please show detail specification or drawing as follow:
A. Raw Material
B.Surface treatment /Finishing
(Zinc,Nickel,Chromium, Electrophoresis,Oil,paint)
C. Wire diameter (Spring wire diameter)
D. Outside diameter/Inner diameter (Diameter of the outer /inner diameter of the spring)
E. Free length/ Body length
F. Type of ends
G. Order quantity
Our Advantage
WHAT MAKE US DIFFERENT?
Advanced Equipments & Skilled Technicians
Most of our machines are imported from Japan,Germany and Taiwan,and also our engineers and technicians are well trained and skilled with many years’s industry experience.
Production & Testing Equipments
For production, we have CNC forming machines and CNC spring end grinder. Forming machines such as 8-angle forming machine, four-axis coil-spring machine, auto coil-spring machines.
Model: 502S, 505WS, MAX35T, CMM-10-350, MAX10TS. Total 28 sets.
For testing equipment, such as torsion-testing machine ,TLS-S501 digital tension /compress test machine, tensile strength test machine, CPJ-4025-w projector. Total 4 sets.
Quality & Service
We have professional quality inspection to ensure that problems are reduced.
After sending, we will track the products for you once every two days, until you get the products. When you got the goods, test them, and give me a feedback.If you have any questions about the problem, contact with us, we will offer
the solve way for you.
International Certificate
Passed ISO 9001:2008, NSF-ISR, RoHS, PONY
Common Questions Answered
Q1:Are You a Manufacturer or a Trade Company?
A:We are a professional manufacturer specialized in research, development, manufacture and marketing in the field of spring,ensuring competitive pricing, high-quality materials, and full customization control. Additionally, we provide one-stop sourcing services to offer a diverse selection of spring products.
Q2:Do You Have a Price List?
A:Since we specialize in customized spring solutions, pricing depends on quantity, raw material, and quality requirements. Thanks to our raw material partners and efficient production, we guarantee the best value. Share your project details, and we’ll provide a tailored quote!
Q3:How Can I Get a Sample?
A:We can offer samples for quality evaluation.For larger quantity samples, we provide cost-effective solutions. Rest assured, our samples match bulk order quality—consistency is our priority!
Q4:How Do You Ensure Bulk Quality Matches the Sample?
A:We have professional quality inspection to ensure that problems are reduced.
Along with samples, we provide inspection reports. Our 35+ years of export experience ensures you receive exactly what you expect.
Q5:Can You Produce Based on Our Designs?
A:Absolutely! Our CAD/3DMAX-expert designers excel in OEM/ODM spring production. Or you share your drawings for production.
Q6:What’s the Production Lead Time?
A:✅ Standard orders: 2–4 weeks (depending on quantity & product type).
✅ Custom orders: Exact timeline confirmed after reviewing your requirements.
With our streamlined production and ample material stock, we prioritize efficiency without compromising quality.
Q7:Do You Deliver to My Country? Can You Offer Door-to-Door Service?
A:Yes, we ship worldwide!Choose:
Port-to-port (flexible for large orders).
Door-to-door (hassle-free delivery to your site).
Just share your delivery address and we'll help check the most suitable shipping option and exact cost for you.
Q8:What Are Your Payment Terms?
A:Flexible options:
✅ 30% deposit, 70% before shipment (T/T)
✅ 50% deposit, 50% before shipment (T/T)
