Can I get free samples?

Yes, free samples (1-3 pcs standard specification) are available. Express shipping is at the customer's account, and sample cost is refundable upon bulk order.

What quality assurance measures are in place?

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

Where is the factory located?

Our factory is located in Ningbo, Zhejiang, China, a major port city with excellent transportation infrastructure.

Premium Extra Large Washers with Square Hole for Wood Construction

Name: Premium Extra Large Washers with Square Hole for Wood Construction
Brand: Ningbo Yinzhou Sokun Import and Export Co., Ltd.
SKU: 2200152245

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

Brass

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

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: Heavy-duty extra large washers with square hole strictly following DIN 440 standards for timber constructions.

Flexible Customization: Offer full customization from samples or designs, including standards (GB, DIN, ISO, JIS) and surface finishes.

Diverse Material Options: Available in carbon steel and stainless steel with finishes like Zinc Plated, Hot Dip Galvanized, and Dacromet.

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

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

Free Sample Availability: Free standard samples (1-3 pcs) available with express shipping; sample cost refundable upon bulk order.

Global Market Experience: Serving North America, Europe, Australia, Asia, and more with 15 years of export experience.

Flexible Payment Terms: Accept T/T, LC at sight, D/P, PayPal, and Western Union to accommodate various transaction needs.

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 are the available materials and finishes?

Materials include carbon steel and stainless steel. Finishes available are Zinc Plated, Hot Dip Galvanized Steel, Dacromet, Nickel Plated, Black Oxide, and Plain.

Q:Can the washers be customized?

Yes, we offer flexible customization from samples or designs. Standards can be GB, DIN, ISO, or JIS, and sizes are according to customer requirements.

Q:What is the delivery time for orders?

Normally 30-40 days. Peak season lead time is one month, while off-season is also one month. Customized samples take 15 working days.

Q:Is a minimum order quantity (MOQ) required?

The Minimum Order Quantity is 1 Kg.

Q:What payment terms do you accept?

Standard terms are 30% T/T deposit with 70% balance against B/L copy. We also accept LC at sight, D/P, PayPal, and Western Union.