Do you provide stock service for large quantity orders?

Yes, our warehouse provides specific stock service for long-term business. You can schedule shipments on an annual or monthly basis.

What payment terms do you accept?

We accept T/T, L/C at sight, DP, PayPal, Western Union, and Small-amount payment.

Custom Latch Hook Torsion Spring for Door Hinge

Name: Custom Latch Hook Torsion Spring for Door Hinge
Brand: Yueqing Dofo Spring Manufacturing Co., Ltd.
SKU: 1901086835

Zhejiang, ChinaYueqing Dofo Spring Manufacturing Co., Ltd.

US$0.20-1.20

10,000 Pieces

Sample price:US$80.00/piece.Request sample

Product profile

Customization

Available

Function

Pressed, Buffer

Material

Steel

Model NO.

DF2103502

Usage

Industrial, Auto, Motorcycle, Home Appliance

Load Type

Torsion

Production Process

Cold Roll

Shape

Coil

Product Name

Torsion Spring Door Hinge

Business Mode

Factory OEM

Material Standard

GB 4357-09 or Equivalent

Wire Range

From Min 0.1mm(0.004inch) to Max 12mm(0.48inch)

Winding Direction

Left and Right

End Type

Single Torsion

Surface Treatment

Zinc Plated

Coating Thickness

8~10 Micrometer

Testing Method

Random Sample Inspection

Tolerance

GB Standard, Grade II or as Per Your Requirement

Spring Rate Tolerance

+-3%~10%

Aql Level

Aql 1.0

Packing Method

OPP Bags with Blank Carton

Normal Carton Size

23X23X31/Cm with No Mark

Certificate

ISO9001, SGS, RoHS, CE, Ts16949

Transport Package

Carton and Outer Wooden Case

Specification

customized

Trademark

DOFO

Origin

Wenzhou, China

HS Code

7320909000

Production Capacity

1, 000, 000 Pieces Per Month

Key features

Customizable Dimensions: Wire range from 0.1mm to 12mm with customized winding direction and end types.

RoHS Compliant Materials: Available in Carbon Steel, Stainless Steel, and Music Wire, all meeting RoHS standards.

Design Assistance: Engineers provide CAD, 3D, and 2D design layouts and prototype development support.

Flexible MOQ Options: Supports both small quantity and large run orders based on specific customer demands.

Sample Charge Refund: Custom spring sample charges are refunded upon placement of the formal order.

Multiple Coating Choices: Offers Zinc Plated, Nickel Plated, Black Oxide, and other RoHS-compliant surface treatments.

Fast Lead Time: Delivery within 25 days for standard molds; 30-40 days for complex custom shapes.

Quality Certification: Certified with ISO9001, SGS, RoHS, CE, and Ts16949 for reliable industrial performance.

Company profile

High Repeat Buyers ChoiceIn-stock Capacity100% Finished Products InspectionQuality Assurance

Yueqing Dofo Spring Manufacturing Co., Ltd.

Zhejiang, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 26 Years CertifiedNearest Port: Ningbo PortAverage Response Time: ≤0.22h

AI-Powered supplier vetting

SummaryThe supplier is a professional technical supplier with a strong emphasis on research and development, evidenced by their ability to provide 3D software design services and ODM capabilities. They hold several important certifications, enhancing their global competitiveness, but lack overseas warehouse and showroom capabilities. Though they have a comprehensive after-sales service protocol, their financial records over the last three years indicate zero revenues and profits, raising concerns about financial credibility. Their production capabilities are supported by valid contracts and in-stock services, though their presence in overseas markets is limited. They offer extensive customization services and have a structured approach to quality control, but do not handle OEM services for popular brands. Overall, their innovation and customization strengths are notable, yet financial and overseas market limitations may impact their future growth potential.

Supplier typeThe supplier is a professional technical supplier with R&D capabilities and a focus on innovation, having expanded their product range significantly over 20 years of development.

CertificationsThe supplier holds ISO9001, TS16949, ISO140001, OHSAS18001, and BV certifications, indicating a strong compliance and quality management framework.

After-Sales capabilityThe supplier has clear procedures and records for handling customer complaints and corrective actions, along with a quality assurance and traceability framework.

Financial creditThe supplier's financial records show zero operating revenues, costs, and profits over the last three years, indicating significant financial credibility concerns.

R&D capabilityThe supplier demonstrates strong innovation capability with evidence of new product development and ODM services, although they lack SDK availability.

Customization capabilityThe supplier offers extensive customization services, ranging from full to minor and flexible customization, demonstrating strong design and adaptation capabilities.

Client casesThe supplier does not provide OEM services for popular brands, which may limit their exposure to high-profile customer cases.

Product Q&A

Q:Which materials are available and do they meet RoHS certification?

DoFo Spring manufactures springs using High-Grade Spring Steel, Carbon Steel, Stainless Steel, and Music Wire. All materials comply with the RoHS standard.

Q:Do you support small quantity orders or only large runs?

We support both small quantity and large run orders based on your demand. We work with you to choose the most effective solution.

Q:Does DOFO spring offer design service or initial assistance?

Yes, our engineers provide initial design assistance to lower production costs. We offer CAD, 3D, and 2D design layouts as well as prototype development.

Q:What is the typical lead time for custom springs?

For springs within our mold range, delivery is within 25 days. For complex shapes, the delivery time is around 30-40 days.

Q:Do you charge for custom spring samples?

The sample charge is refunded when we receive the formal order. However, if the sample requires an additional mold, we will charge for it.