What materials do you use?

We use carbon steel and stainless steel with finishes including zinc plated, hot dip galvanized, and black oxide.

Where is your factory located?

Our headquarters and factory are located in Ningbo, China, a major port city with excellent transportation infrastructure.

What is your minimum order quantity?

The minimum order quantity is 1 Kg.

Premium Double Coil Spring Lock Washers for Secure Fastening

Name: Premium Double Coil Spring Lock Washers for Secure Fastening
Brand: Ningbo Yinzhou Sokun Import and Export Co., Ltd.
SKU: 2189045915

Zhejiang, ChinaNingbo Yinzhou Sokun Import and Export Co., Ltd.

US$0.10

1,000-4,999 Pieces

US$0.08

5,000-9,999 Pieces

US$0.07

10,000-99,999 Pieces

US$0.05

100,000+ Pieces

Product profile

Customization

Available

Type

Washer

Material

Stainless Steel, Steel

Model NO.

DIN125, DIN9021, DIN127, SAE, USS, ASME B18.22.1

Combination Washer Structure

Combination Washer Packaging

Spring Washer Type

Standards

GB, DIN, ISO, JIS

Finished

Black, Zinc, Plain

Shape

Round, Lock, Square

Selling Units

Building, Industry, Machinery

Package

Customer'require

Delivery Time

15-30

Transport Package

Cartons & Pallets or According to Customer''s Requ

Specification

Trademark

SOKUN

Origin

Zhejiang

HS Code

7318150000

Production Capacity

100000000

Key features

ISO Certified Manufacturer: Established in 2009 with comprehensive R&D and vertically integrated production facilities.

Flexible Customization: Offers full customization from samples, designs, and specific customer requirements.

Rigorous Quality Assurance: Implements pre-production sampling and full batch inspection including torque and salt spray tests.

Wide Material Selection: Available in carbon steel and stainless steel with various finishes like zinc plated and black oxide.

Global Market Reach: Serves clients across North America, Europe, Asia, South America, Africa, and the Middle East.

Fast Sample Service: Provides free standard samples and customized prototyping within 15 working days.

Diverse Product Portfolio: Manufactures industrial fasteners and solar energy installation systems with UL certification.

Multiple Payment Options: Accepts T/T, LC, D/P, PayPal, Western Union, and small-amount payments.

Company profile

High Repeat Buyers ChoiceODM ServicesR&D CapabilitiesProduction Process Visualization

Ningbo Yinzhou Sokun Import and Export 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: 15 Years CertifiedNearest Port: Shanghai Port, Ningbo PortAverage Response Time: ≤4.96h

AI-Powered supplier vetting

SummarySokun is a limited company with 21 employees, related companies, and product coverage including fasteners, machined parts, and stamping parts. It supports customization from samples and designs, offers ODM services, and reports OEM service for well-known brands. Quality processes include quality assurance, documented inspection instructions, and complaint-handling records, although finished-product inspection is random and only one quality inspector is reported. Production-related strengths include in-stock capability, CNC and punching equipment, and one-month stated lead times in both peak and off-season periods. Key limitations are the absence of a valid manufacturing-capacity contract with related subcontractors, no overseas warehouse, branches, agents, or showrooms, and no documented R&D audit materials, new products in the past year, or R&D patents. Financial credibility cannot be determined from the provided information.

After-Sales capabilityThe supplier has a clear customer-complaint procedure with followed records and accepts several quotation and payment terms. However, it has no overseas warehouse, showroom, agent, or branch, and reports zero countries with overseas services, limiting evidence of localized after-sales support.

R&D capabilityThe supplier provides ODM and multiple customization-based design services, but reports no new products during the past year, no available SDK, no R&D audit documentation, and zero R&D patents. These facts indicate design support but limited documented evidence of independent innovation.

Production capacityProduction evidence includes CNC and punching equipment, in-stock capability, one-month lead times in both peak and off-season, and a product scope aligned with machined and stamping parts. Nevertheless, there is no valid manufacturing-capacity contract with related subcontractors, which creates a documented capacity-governance weakness.

Customization capabilityThe supplier explicitly supports customization from samples, designs, full customization, flexible customization, and minor customization, and also offers ODM services. This is direct evidence of broad customization capability.