What is your quality assurance system?

We implement a rigorous two-stage quality assurance protocol: Pre-production sampling with dimensional verification and Full batch inspection including torque testing, salt spray analysis, and material certification prior to container loading.

What standards do your products meet?

Standards: GB, DIN, ISO, JIS. Specifically, Square Taper Washers meet DIN 6918 standard.

Heavy-Duty Square Taper Washers for Steel Bolt Applications

Name: Heavy-Duty Square Taper Washers for Steel Bolt Applications
Brand: Ningbo Yinzhou Sokun Import and Export Co., Ltd.
SKU: 2199889485

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

Beveled Washers

Material

Brass

Model NO.

DIN 6918

Combination Washer Structure

Combination Washer Packaging

Spring Washer Type

Standards

GB, DIN, ISO, JIS

Finished

Zinc

Name

Beveled 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

Customization Options: Flexible customization from samples and designs, full customization available.

Material Variety: Carbon steel and stainless steel options with various finishes.

Surface Finishes: Zinc Plated, Hot Dip Galvanized, Dacromet, Nickel Plated, Black Oxide, Plain.

Standards Compliance: Meets GB, DIN, ISO, and JIS standards including DIN 6918.

Quality Assurance: Two-stage protocol with dimensional verification and torque testing.

Sample Availability: Free standard samples available; custom samples within 15 working days.

ISO Certification: ISO-certified manufacturer with comprehensive R&D capabilities.

Global Shipping: Express shipping via DHL, UPS, FedEx with sample cost refundable on bulk order.

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: ≤5.09h

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 a sample?

Free samples available (1-3 pcs standard specification). Express options: DHL/UPS/FedEx (customer's account). Prototyping service: Customized samples within 15 working days. Note: Sample cost refundable upon bulk order confirmation.

Q:What are the payment terms?

Standard commercial terms: 30% T/T deposit with 70% balance payable against Bill of Lading copy. For orders under $1,000 USD, we recommend full advance payment. Acceptable payment instruments: SWIFT transfer, LC at sight (negotiable for bulk orders).

Q:What is the delivery time?

Normally in 30-40 days. Peak Season Lead Time: one month, 1-3 months. Off Season Lead Time: one month.

Q:What materials are used for the washers?

Material: Carbon steel and stainless steel. Finished: Zinc Plated, Hot Dip Galvanized Steel, Dacromet, Nickel Plated, Black Oxide, Plain.

Q:Do you offer customization services?

Yes, we offer flexible customization, customization from samples, customization from designs, and full customization.