How do you ensure product quality?

We implement a strict 6-step inspection process: material, product, routing, pre-plating, post-plating, and pre-delivery inspections.

What is your minimum order quantity (MOQ)?

The minimum order quantity is 500 PCS.

What certifications does your company hold?

We are certified with IATF16949, SGS, ISO9001:2015, and ISO14001.

Custom High Quality Large Coil Spring

Name: Custom High Quality Large Coil Spring
Brand: Yangzhou Mingfeng Spring Co., Ltd.
SKU: 770252275

Jiangsu, ChinaYangzhou Mingfeng Spring Co., Ltd.

US$3.50

1 Piece

Sample price:US$20.00/piece.Request sample

Product profile

Customization

Available

Function

Pressed

Material

Stainless Steel

Model NO.

MF156

Usage

Industrial, Auto, Furniture, Motorcycle, Home Appliance

Load Type

Compression

Production Process

Hot Roll

Shape

Coil

Wire Diameter

16.2mm

Free Height

423mm

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.

Full Customization: Supports full customization from samples, designs, and flexible minor adjustments.

IATF16949 Certified: Manufacturing process certified by IATF16949 and SGS for high quality standards.

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

6-Step Quality Control: Strict 6-stage inspection process from material to final delivery ensures quality.

Large Production Capacity: Annual production exceeds 800 million pieces with a plant area over 8000 sqm.

Diverse Surface Treatment: Offers white zinc, color zinc, nickel plating, chrome-plating, and powder spraying.

Fast Response Service: Customer complaints receive a response within 24 working hours for satisfaction.

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.