What are the payment terms?

Standard terms are 30% T/T deposit with 70% balance against B/L copy. For orders under $1,000, full advance payment is recommended.

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 and salt spray analysis.

Where is your company located and when was it established?

Established in 2009, we are headquartered in Ningbo, China, with vertically integrated production facilities.

High Quality DIN 440 Extra Large Square Hole Washer for Timber Constructions

Name: High Quality DIN 440 Extra Large Square Hole Washer for Timber Constructions
Brand: Ningbo Yinzhou Sokun Import and Export Co., Ltd.
SKU: 2200241885

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

Square Hole Washers

Material

Carbon Steel

Model NO.

DIN 440

Combination Washer Structure

Combination Washer Packaging

Spring Washer Type

Standards

GB, DIN, ISO, JIS

Finished

Zinc

Name

Square Hole Washers

Selling Units

Building, Industry, Machinery

Package

Customer'require

Delivery Time

15-30

OEM

OEM ODM

Quality

High Quality

Transport Package

Cartons & Pallets or According to Customer''s Requ

Specification

Trademark

SOKUN

Origin

Zhejiang

HS Code

7318150000

Production Capacity

100000000

Key features

DIN 440 Standard Compliance: Manufactured strictly according to DIN 440 standards for timber constructions.

Flexible Customization: Supports OEM/ODM, custom sizes, and various surface finishes like Zinc Plating.

ISO Certified Manufacturer: Established in 2009, ISO-certified with comprehensive R&D and production facilities.

Rigorous Quality Assurance: Two-stage QA including pre-production sampling and full batch torque/salt spray testing.

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

Global Market Experience: Serving North America, Europe, Australia, and Asia with long-term business relationships.

Low Minimum Order Quantity: Flexible MOQ starting from just 1 Kg to accommodate diverse customer needs.

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

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: ≤4.70h

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.