How do you control product quality?

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

What is the minimum order quantity?

The minimum order quantity is 500 PCS.

What payment terms do you accept?

We accept LC, T/T, D/P, PayPal, Western Union, and small-amount payment.

High Quality Stainless Steel Constant Spring

Name: High Quality Stainless Steel Constant Spring
Brand: Yangzhou Mingfeng Spring Co., Ltd.
SKU: 770158015

Jiangsu, ChinaYangzhou Mingfeng Spring Co., Ltd.

US$0.03

1 Piece

Product profile

Customization

Available

Function

Pressed

Material

Stainless Steel

Model NO.

MF144

Usage

Industrial, Auto, Furniture, Motorcycle, Home Appliance

Load Type

Extension

Production Process

Hot Roll

Shape

Coil

Wire Diameter

0.3mm

Length

as Your Request

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

IATF16949 Certified Quality: High quality coil springs meeting IATF16949 and SGS standards for industrial and automotive use.

Customizable Dimensions: Wire diameter, length, and free height can be customized as per your specific request.

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

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

Advanced CNC Machinery: Equipped with 50+ sets of advanced numerical control coil spring machines imported from Taiwan.

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

OEM/ODM Services: Supports full customization from samples, designs, and minor adjustments with flexible options.

Free Sample Availability: Free samples are available for evaluation, subject to company rules regarding value and shipping.

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: ≤11.20h

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?

We provide a comprehensive 2-year warranty for all our mechanical equipment.

Q:What is the delivery time?

Normally our delivery time is 45 days, except for holidays and special bulk orders.

Q:Do you provide free samples?

Yes, free samples are available for us, though the sample and value should be according to our company rule.

Q:What are your main products?

Our main products are coil spring, suspension spring, valve spring, oil seal spring, torsion spring, extension spring, snap spring, and spiral spring.

Q:What is your main market?

Our main markets include domestic, Europe, America, Russia, South America, and the Middle East.