How do you control the quality?

The QC do routing inspection every 30 minutes during production and make first article inspection report and do the checking before shipment.

What is your after sales service?

We will update you the production process every 2 days and provide 24 hour online service.

Customized Heavy Duty Door Lock Stainless Steel Coil Double Torsion Spring

Name: Customized Heavy Duty Door Lock Stainless Steel Coil Double Torsion Spring
Brand: Yangzhou Baijia Spring Manufacturing Co., Ltd.
SKU: 2067846955

Jiangsu, ChinaYangzhou Baijia Spring Manufacturing Co., Ltd.

US$0.16

1,000-99,999 Pieces

US$0.14

100,000-999,999 Pieces

US$0.10

1,000,000+ Pieces

Sample price:US$0.00/piece.Request sample

Product profile

Customization

Available

Function

Pressed, Phonation, Buffer, Drive, Restoration, Measurement

Material

Steel

Usage

Industrial, Auto, Furniture, Motorcycle, Home Appliance

Load Type

Compression

Production Process

Cold Roll

Shape

Cylinder

Surface Treatment

Nickel Plating, Chrome Plating, Zinc Plating, Blac

Wire Diameter

0.06-10mm

Color

Customized

All Kinds of Metal Springs

Customized

Transport Package

Cartons or as Required

Specification

Customized

Trademark

Baijia

Origin

Jiangsu, Yangzhou

HS Code

732090

Production Capacity

50000000pieces/Year

Key features

Customized Color Options: Color is fully customizable to meet specific customer requirements.

Wide Material Selection: Available in Stainless steel, Carbon steel, Music wire, Copper, and Alloy steel.

Diverse Surface Treatments: Options include Nickel plating, Chrome plating, Zinc plating, Powder coating, and more.

Flexible Wire Diameter: Wire diameter ranges from 0.06mm to 10mm for various applications.

ODM & OEM Services: Full ODM and OEM services welcomed with support for custom drawings.

Competitive Pricing: Reasonable and competitive prices based on customer-provided drawings.

20 Years Experience: Over two decades of professional manufacturing experience in spring production.

Small Order Acceptance: Small orders are accepted to accommodate diverse customer needs.

Company profile

Fast DeliveryStandardized quality controlManagement CertificationQuality Assurance

Yangzhou Baijia Spring Manufacturing Co., Ltd.

Jiangsu, China

Business Type: Manufacturer/Factory, Trading CompanyExport Year: 2010-08-01Nearest Port: shanghai, shenzhen, ningboAverage Response Time: ≤15hTerms of Payment: LC, T/T, D/P, etc.International Commercial Terms(Incoterms): FOB, CFR, CIF, FAS, Others

AI-Powered supplier vetting

SummaryThe supplier demonstrates broad customization, OEM/ODM availability, documented quality and service procedures, ISO9001:2015 certification, and substantial stated output for metal shrapnel and springs. It exports to multiple global regions, has self-operated import/export rights, and reports peak and off-season lead times within 15 workdays. However, it operates one production line and lacks overseas warehouses, showrooms, agents or branches, and offline trade-show participation. Financial records are referenced for 2022–2024, but no financial results are provided. Innovation evidence is mixed: ODM and extensive design services are available, while no new product was reported in the past year and no SDK is available.

Supplier typeThe supplier provides OEM services for well-known brands and ODM services, offers self-operated import/export capability, and supports multiple forms of product customization. These attributes indicate a manufacturer capable of both contract production and design-based supply rather than only distribution.

CertificationsThe supplier states that it holds an ISO9001:2015 certificate and describes a strict quality-control system covering the whole production process. The provided evidence supports certification holding, although no additional certifications are identified.

After-Sales capabilityThe supplier has documented procedures and records for service assessment, corrective and preventive actions, and customer complaints. It accepts several quotation and payment terms, but has no overseas warehouse, showroom, overseas agent or branch, and reports zero countries with overseas services, limiting local after-sales coverage.

R&D capabilityThe supplier offers ODM and broad design services, including customization from samples and designs. Conversely, it reported no new product in the past year and no available SDK, so evidence supports design execution more strongly than ongoing product innovation or software capability.

Production capacityThe supplier operates one production line and reports annual output of 6 billion metal shrapnel pieces and 50 million compression, tension and torsion spring pieces, with four quality inspectors. It states lead times within 15 workdays in both peak and off-season periods, but the one-line structure provides limited evidence of production redundancy.

Customization capabilityBoth production and R&D information lists customization from samples, designs, full customization, minor customization and flexible customization. This is explicit evidence of a broad customization range for spring and metal-shrapnel products.

Product Q&A

Q:How to pack?

The goods are placed into the plastic bags first and then put them into the shipping cartons. The bags and carton sizes can be customized as to your needs.

Q:What is the delivery time?

Delivery will occur between 10 and 15 days after the order date. Faster delivery time can be arranged if needed.

Q:What is the MOQ?

To start our good business relationship, the MOQ can be 1000PCS.

Q:What's your payment methods?

Paypal, T/T, L/C, Western Union.

Q:How can I get an sample for testing?

A, Free sample: We'd love to send you free samples which have in stock, and you just need to arrange the shipment or pay the shipping fee. B, Charged sample: $100 for sample develop, and refund after mass production.