If we order large quantities, will you house and ship springs based on a required basis?

Our warehouse provides specific stock service for long-term business. You can schedule shipments annually or monthly, and we will ship on a specific schedule.

What payment terms do we accept for spring orders?

We accept T/T, L/C at sight, DP, and Western Union.

Custom Steel O Ring for Curtain

Name: Custom Steel O Ring for Curtain
Brand: Yueqing Dofo Spring Manufacturing Co., Ltd.
SKU: 946179265

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.

DF2012227

Usage

Industrial, Auto, Motorcycle, Home Appliance

Load Type

Compression

Production Process

Cold Roll

Shape

Coil

Product Name

Steel O Ring

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

Customized Shapes Available

Surface Treatment

Rusted Oil

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

RoHS Compliant Materials: Manufactured with high-grade carbon, stainless steel, and music wire, all complying with RoHS standards.

Custom Design Support: Engineers provide initial design assistance and offer CAD, 3D, and 2D drawing formats for prototype development.

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

Refundable Sample Charges: Sample charges are refunded upon receiving the formal order, except for additional mold costs.

Certified Quality Assurance: ISO9001, SGS, RoHS, CE, and Ts16949 certified with 100% finished product inspection.

Wide Material Range: Wire diameter available from 0.001 to 0.075 inches, covering various application requirements.

Stock and Shipping Service: Provides specific stock service for long-term business with flexible annual or monthly shipment schedules.

Multiple Payment Options: Accepts T/T, L/C at sight, DP, PayPal, Western Union, and small-amount payments.

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: ≤0.64h

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 compression, extension, torsion springs, and wire forms using high-grade carbon steel, stainless steel, and music wire, all complying with RoHS standards. Wire diameter ranges from 0.001 to 0.075 inches.

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

We manufacture both large quantity and small quantity springs based on your demand and will work with you to choose the most effective solution.

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

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

Q:Do you charge for custom spring samples?

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