What is the typical delivery time?

Normal delivery time is 30-40 days. During peak seasons, it may take 1-3 months, while off-season lead time is about one month.

How do you ensure product quality?

We use a two-stage quality assurance system: pre-production sampling with dimensional verification and full batch inspection including torque testing and salt spray analysis before loading.

What certifications does the manufacturer hold?

We are an ISO-certified manufacturer established in 2009, specializing in precision fasteners and solar mounting systems with rigorous quality protocols.

High-Quality Precision Curved Washers DIN 6904 for Secure Assembly

Name: High-Quality Precision Curved Washers DIN 6904 for Secure Assembly
Brand: Ningbo Yinzhou Sokun Import and Export Co., Ltd.
SKU: 2200197425

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

Spring Lock Washers

Material

Brass

Model NO.

DIN 6904

Combination Washer Structure

Combination Washer Packaging

Spring Washer Type

Standards

GB, DIN, ISO, JIS

Finished

Zinc

Name

Spring Lock Washers

Selling Units

Building, Industry, Machinery

Package

Customer'require

Delivery Time

15-30

Sample

Availabe

Service

OEM ODM Custom Service

Transport Package

Cartons & Pallets or According to Customer''s Requ

Specification

Trademark

SOKUN

Origin

Zhejiang

HS Code

7318150000

Production Capacity

100000000

Key features

DIN 6904 Standard Compliance: Precision curved spring washers strictly adhering to DIN 6904 standards for secure fastening.

Flexible Customization Options: Offering full customization from samples or designs, including standards, finishes, and sizes.

Diverse Material Selection: Available in Carbon steel and Stainless steel to meet various environmental and strength requirements.

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

Rigorous Quality Assurance: Two-stage protocol: pre-production sampling and full batch inspection with torque and salt spray tests.

Free Sample Availability: 1-3 pcs free standard samples available; sample cost refundable upon bulk order confirmation.

Low Minimum Order Quantity: Flexible MOQ starting from just 1 Kg, suitable for small batches and prototyping needs.

ISO Certified Manufacturer: Established in 2009, ISO-certified factory with vertical integration and lean manufacturing capabilities.

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:What materials are available for these washers?

We offer Carbon steel and Stainless steel materials to suit different corrosion resistance and strength needs.

Q:Can I customize the size or finish of the washers?

Yes, we provide flexible customization from samples or designs. Sizes follow standards or customer requirements, and finishes include Zinc Plated, Hot Dip Galvanized, Dacromet, etc.

Q:What is the minimum order quantity (MOQ)?

The minimum order quantity is 1 Kg, allowing for small batch purchases and testing.

Q:Are free samples available for testing?

Yes, we provide 1-3 pieces of free standard specification samples. The sample cost is refundable when you confirm a bulk order.

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, full advance payment is recommended. We also accept LC, D/P, PayPal, and Western Union.