OEM Adjustable Heavy Duty Tension Coil Spring Metal Steel Extension

Basic Information
Place of Origin: China
Brand Name: HEZHI
Certification: Rohs&Reach
Model Number: N/A
Minimum Order Quantity: 1000pcs
Price: $0.05 - $0.5USD/ Piece/Pieces
Packaging Details: PE Bag with Carton Box
Delivery Time: 7-15 work days
Payment Terms: T/T, L/C
Supply Ability: 10,000,000 Piece/Pieces per Month According to the order
Detail Information
Product Name: Factory Oem Services Free Sample Extension Adjustable Heavy Duty Tension Metal Steel Spring Application: Furniture, Industrial, Auto, Car ,Toy And All Kinds Of Products
Size: As Your Custom Usage: Industrial, Automobile
Wire Diameter: 0.05-20mm Material: Copper, Stainless Steel, Carbon Steel ,Piano Wire, Alloy, Copper Or As Required
Finish: Zinc/Nickel/Chrome/Powder Coating Or Customized, Nickel Plating Color: White, Black, Silver, Gold Or As Your Requirements
Shipping: As Customer's Demand Scope Of Business: Springs
High Light:

Heavy Duty Tension Coil Spring


Adjustable Tension Coil Spring


adjustable tension spring Extension

Product Description

Factory Oem Services Free Sample Extension Adjustable Heavy Duty Tension Metal Steel Spring


Tension Spring

Tension spring is a spiral spring bearing axial tension, the hook in the form of side hook spring, long hook spring, English hook spring, German hook spring, semicircle hook spring, duck beak hook spring and so on," hook "is used to ensure the tension source of the stretching spring, generally made of circular section material spring steel, when not bearing load, The coil between the tension spring is generally tight without gap, and the use of stretch resilience (tension) work, to control the movement of parts, energy storage, measurement force, etc., most of the stretch spring is usually under a certain degree of tension, even in the absence of any load. This initial tension determines how tightly the stretch spring is wound without any load.

Extension spring production process:
spring wire → spring winding → low temperature stress relief annealing → high temperature degreasing → washing → dilute hydrochloric acid washing → washing → electric galvanizing (80 min) → washing → blanking → dehydrogenation treatment (200 ℃, 4 h) → feeding → washing → color passivation → washing → drying → blanking → inspection

Material Stainless Steel (SUS304,301.316,310,201,631, ect)
Paino/Music Steel
Carbon Steel or as your requirments
Iron etc
Finished Electroplating Zinc ,Nickel ,copper ,black and so on
Heating In different tempurture
Cleanning Passivation,Clean,Rust-Proof
Process CNC Machine, digital control multi-functional computer spring coiling machine, mechanical automatic spring coiling machine, spring grinding machine, heat treatment equipment, large hot coil spring production line, quality testing instruments.
Application used in computer, electronics, home appliances, cameras, instruments, doors, motorcycles, harvesters, automobiles, and other industries to control the movement of machine parts, ease impact or vibration, storage energy, measure the size of force and so on!
Wire diameter Range 0.05mm-20mm
Design According to customer's drawing or sample




















OEM Adjustable Heavy Duty Tension Coil Spring Metal Steel Extension 0

Material Type Model number Characteristic Application
Stainless Steel (SUS) With or without magnetism shine or nitrided surface, dark surface 201, 202 etc. Less nickel plated, could not proceed salt spray test General using craft and toys
301, 302, 304,  310, 316, 321 High temperature resistance Electronic part, home appliance, Locks, toys 
410, 420, 430 etc. High strength OEM aments and tableware products
630, 631 etc. High heat stability Electrical application or product use under high temperature
Carbon Steel (SWC) Low carbon steel, high carbon steel, nickel plated steel, Galvanized wire 55CrSi 60SizCRVA

Good elasticity

high hardness

Electronic part, home appliance, Locks, toys 

Music Wire





High tensile resistance and long worklife Application for all kinds of small products
Copper Wire Phosph or copper wire( C519R), Nickel plated copper, Bronze   Good conductivity of electrical Electronics, electrical applicance
Iron Galvanize Iron Steel Customized  Soft material Craft spring and Decoration wire
Production Detail


OEM Adjustable Heavy Duty Tension Coil Spring Metal Steel Extension 1

Reference Drawing


OEM Adjustable Heavy Duty Tension Coil Spring Metal Steel Extension 2


Company Profile


Dongguan Hezhi Hardware Co., Ltd. is located in Dongkeng Town, Dongguan City, Guangdong Province, China. We are a worldwide import and export trading company.We belong to a group of companies established in the early 20th century.Our company is a spring factory specializing in R&D design, amnufacturer and sales, introduced equipment technology and hired senior engineers with more ten years of experience to highly cooperate with various customized ODM and OEM products.

Our company is a hardware factory specializing in R&D design, manufacture and sales of precision components. The company introduces advanced equipment and production technology from Taiwan and abroad, adopts CNC high-precision computer machine, compression spring machine and other mechanical equipment, and employs senior engineers with more than ten years of work experience to debug mechanical equipment and customize production.
Slogan:“The testimony is pragmatic and the attitude of the people. Quality service is the pursuit of the people!OEM Adjustable Heavy Duty Tension Coil Spring Metal Steel Extension 3

OEM Adjustable Heavy Duty Tension Coil Spring Metal Steel Extension 4

HeZhi in Vietnam

OEM Adjustable Heavy Duty Tension Coil Spring Metal Steel Extension 5
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Our Service
OEM Adjustable Heavy Duty Tension Coil Spring Metal Steel Extension 7

Pre-Sales Service

* Inquiry and consulting support.
* Sample testing support.
* View our Factory.

After-Sales Service

* Training how to instal the machine, training how to use the machine.
* Engineers available to service machinery overseas.

Packing & Delivery
OEM Adjustable Heavy Duty Tension Coil Spring Metal Steel Extension 8

1. Are you a factory or a trading company?

A1: We are the manufacturer of the hardware. We can provide OEM service and also provide samples for testing. Last but
not least, we produce not only rivet nut column, but aslo al kinds of springs.

2. Small order quantity is workable

A2: From the initial sample design of the spring to the mass production of the springs, we can quickly reach your manufacturing goals and immediately provide the best products because we have an excellent production management system and expertly trained technical personnel.
3. Committed To High Quality Production
A3: To keep HeZhi Springs at the forefront of the industry, we have implemented a stringent internal quality control system and regularly import the latest manufacturing equipment and instruments. Through our precise manufacturing technology and expert mold making process, we provide our customers with the best products and service.
4. Efficiency In Manufacturing
A4: Our company's machinery and equipment are controlled by CNC computers. In order to respond to international needs and standards, we continuously update and upgrade our equipment every year. Our machines effectively increase production capacity and save on manufacturing costs. The manufacturing department is the most important core of the whole company and by treating it with utmost importance, we reap great benefits in manufacturing efficiency.
5. Excellent Customization Services
A5: HeZhi's R&D team designs and completes customized products according to the needs of customers. From the selection of materials to the function of the products, we can design and develop products to suite different customers' requirements. We are constantly involving ourselves in all aspects of the industry because only by having a complete view and analysis of the industry, can there be innovative breakthroughs.

6. Payment Term
*T/T : 30% pre T/T, 70% before delivery.
*Trade Assurance

7. Packing
*A: Poly bag, Plstic tray ,small box, carton.
*B: According to customers' requirements.

8. Delivery
*Sample: 7-10 days after deposit received.
*Batch goods: 12-15 days after samples approved.


Contact Details

Phone Number : 18379949013

WhatsApp : +8618379949013