What quality assurance protocols do you follow?

We implement a two-stage protocol: pre-production sampling with dimensional verification and full batch inspection including torque testing, salt spray analysis, and material certification.

What are your main products?

Our main products include industrial fastening solutions (hex bolts, screws, nuts, washers) and solar energy installation systems (racking, mounting accessories, cable management).

Where is your company located?

We are headquartered in Ningbo, China, a major port city with excellent transportation infrastructure.

Heavy-Duty Steel Lock Washers for Secure Assembly Projects

Name: Heavy-Duty Steel Lock Washers for Secure Assembly Projects
Brand: Ningbo Yinzhou Sokun Import and Export Co., Ltd.
SKU: 2191925195

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

US$0.03

10-4,999 Pieces

US$0.02

5,000-99,999 Pieces

US$0.01

100,000+ Pieces

Product profile

Customization

Available

Type

Disc Spring

Material

Brass

Model NO.

DIN 9

Combination Washer Structure

Combination Washer Packaging

Spring Washer Type

Standards

GB, DIN, ISO, JIS

Finished

Zinc

Name

Disc Spring

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

Comprehensive Customization: Flexible customization from samples, designs, or full customization available.

ISO Certified Manufacturer: Established in 2009 with ISO certification and vertically integrated production.

Free Sample Availability: 1-3 pcs standard specification samples available; cost refundable on bulk order.

Diverse Surface Finishes: Options include Zinc Plated, Hot Dip Galvanized, Dacromet, Nickel Plated, and Black Oxide.

Rigorous Quality Assurance: Two-stage protocol: pre-production sampling and full batch inspection including torque testing.

Global Market Experience: Serving clients in North America, Europe, Asia, and other regions for 15 years.

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

Low Minimum Order Quantity: Minimum Order Quantity is only 1 Kg for flexible purchasing.

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.

Product Q&A

Q:Can you provide samples?

Free samples (1-3 pcs standard specification) are available. Express shipping via DHL/UPS/FedEx is supported. Customized samples take 15 working days. Sample cost is refundable upon bulk order confirmation.

Q:What are the payment terms?

Standard terms are 30% T/T deposit with 70% balance against Bill of Lading copy. For orders under $1,000 USD, full advance payment is recommended. We also accept SWIFT transfer, LC at sight, D/P, PayPal, and Western Union.

Q:What is your customization capability?

We offer flexible customization including customization from samples, designs, and full customization. We can produce non-standard parts, fasteners, and machined parts according to specific requirements.

Q:What is the minimum order quantity?

The Minimum Order Quantity is 1 Kg.

Q:How long is the delivery time?

Delivery time is normally 30-40 days. During peak season, lead time is one month to three months. During off-season, it is one month.