What surface treatments are available?

Options include white zinc, color zinc, nickel plating, chrome-plating, plastic spraying, powder spraying, or paint spraying. Standard color is silver (Trivalent Zinc Plating).

Is OEM/ODM service available?

Yes, OEM and ODM services are available. Customization options include customization from samples, designs, full customization, minor customization, and flexible customization.

How is product quality controlled?

All products go through six checks: material inspection, product inspection, routing inspection, inspection before plating, final inspection after plating, and inspection before delivery.

Custom Large High Carbon Steel Suspension Spring

Name: Custom Large High Carbon Steel Suspension Spring
Brand: Yangzhou Mingfeng Spring Co., Ltd.
SKU: 770508605

Jiangsu, ChinaYangzhou Mingfeng Spring Co., Ltd.

US$3.00

1 Piece

Sample price:US$20.00/piece.Request sample

Product profile

Customization

Available

Function

Pressed

Material

Stainless Steel

Model NO.

MF165

Usage

Industrial, Auto, Furniture, Motorcycle, Home Appliance

Load Type

Compression

Production Process

Cold Roll

Shape

Coil

Wire Diameter

11mm

Free Height

225mm

Surface Treatment

as Your Request

Professional

More Than 25 Years of Experience

Transport Package

Carton

Specification

SGS

Trademark

Origin

Yangzhou Jiangsu

Production Capacity

200000 PCS/Month

Key features

25+ Years Experience: Over 25 years of professional experience in spring manufacturing and production.

IATF16949 Certified: Quality standard certified by IATF16949 and SGS for industrial and automotive use.

Full Customization: Customizable wire diameter, free height, and surface treatment as per customer request.

Advanced CNC Equipment: Equipped with over 50 sets of advanced numerical control coil spring machines.

High Production Capacity: Annual production capacity exceeds 800 million pieces of springs.

Strict Quality Control: Six-step inspection process including material, routing, and final plating checks.

Diverse Surface Finish: Options include white zinc, color zinc, nickel plating, chrome-plating, and spraying.

Fast Response Service: Customer complaints receive a response within 24 working hours with a solution.

Company profile

Yangzhou Mingfeng Spring Co., Ltd.

Jiangsu, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 10 Years CertifiedNearest Port: Shanghai PortAverage Response Time: ≤24h

AI-Powered supplier vetting

SummaryThe supplier manufactures and sells springs, mechanical components, vibration and noise-reduction equipment, rubber and plastic products, hydraulic components, and related products. It reports broad customization and ODM capabilities, recent new-product activity, OEM service for recognized brands, and production-related facilities covering winding, grinding, spraying, polishing, and punching. Quality control includes four inspectors and documented finished-product inspection instructions. The supplier states that it maintains written procedures for supplier assessment, corrective and preventive actions, and complaint handling. It has valid manufacturing contracts with associated subcontractors and reports inventory capability, but no overseas warehouse or showroom. Export sales represent 41%–50% of total sales, with Shanghai Port identified as the nearest port and stated lead times of within 15 working days in both peak and off-season. Evidence is insufficient to confirm certifications, detailed...

Supplier typeThe supplier is a manufacturer and seller of springs, mechanical parts, vibration and noise-reduction equipment, rubber and plastic products, hydraulic machinery components, and related equipment. Its registered business scope indicates a multi-product industrial manufacturer rather than a pure trading intermediary.

After-Sales capabilityThe supplier reports clear procedures and followed records for handling customer complaints, as well as documented corrective and preventive action procedures. This supports an established complaint-resolution process, although the slices do not provide response times, service results, warranty terms, or overseas service coverage.

R&D capabilityThe supplier states that it had new products during the past year and provides ODM services, indicating ongoing product-development activity. However, it reports no available SDK, and no details are provided on R&D staffing, patents, laboratories, or development resources.

Production capacityProduction evidence includes dedicated winding, grinding, spraying, polishing, and punching facilities, four quality inspectors, documented finished-product inspection instructions, inventory capability, and valid contracts with associated subcontractors. The supplier also reports lead times within 15 working days in both peak and off-season and describes a strict quality system, but the stated monthly production figure is unclear and cannot support a precise capacity assessment.

Customization capabilityThe supplier explicitly offers customization from samples, customization from designs, full customization, minor customization, and flexible customization. It also reports ODM availability, providing direct evidence of broad product-development and customization support.

Client casesThe supplier states that it provides OEM services to recognized brands and has received positive customer recognition from the seal, automotive and motorcycle, mechanical, electrical, electronics, and appliance industries. No customer names, project descriptions, order scope, or independently verifiable case details are provided.

Product Q&A

Q:What is the warranty period?

The provided text does not specify a warranty period. However, the company offers a 24-hour response time for any client complaints.

Q:What is the MOQ?

The Minimum Order Quantity (MOQ) is 500 PCS.

Q:What is the lead time for delivery?

Normally, the delivery time is 45 days, except for holidays and special bulk orders. Peak and off-season lead times are within 15 workdays.

Q:Can I get free samples?

Yes, free samples are available, but the sample and value should be according to the company's rules.

Q:What materials are used for the springs?

Materials include carbon steel, stainless steel, alloy, and spring steel. Raw materials are purchased from iron and steel group companies in Jiangsu and Zhejiang.