What materials are used for your products?

We use carbon steel and stainless steel. Surface finishes include Zinc Plated, Hot Dip Galvanized, Dacromet, Nickel Plated, Black Oxide, and Plain.

Are you an ISO certified manufacturer?

Yes, we are an ISO-certified fastener manufacturer established in 2009 with comprehensive R&D capabilities and vertically integrated production facilities.

What are your main products?

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

Premium DIN 433 Cheese Head Screws for High Hardness Applications

Name: Premium DIN 433 Cheese Head Screws for High Hardness Applications
Brand: Ningbo Yinzhou Sokun Import and Export Co., Ltd.
SKU: 2200111205

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

Plain Washers

Material

Brass

Model NO.

DIN 433

Combination Washer Structure

Combination Washer Packaging

Spring Washer Type

Standards

GB, DIN, ISO, JIS

Finished

Zinc

Name

Plain 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

Flexible Customization: Offers full customization from samples or designs to meet specific requirements.

ISO Certified Manufacturer: Established in 2009 with comprehensive R&D and vertically integrated production.

Free Sample Availability: Provides 1-3 pcs standard free samples with cost refundable on bulk orders.

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

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

Global Market Experience: Serves clients across North America, Europe, Asia, and the Middle East since 2009.

Multiple Payment Options: Accepts T/T, LC, D/P, PayPal, and Western Union for flexible transactions.

Fast Delivery Capability: Standard delivery within 30-40 days with peak season lead time of one month.

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: ≤4.93h

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) are available. Express shipping via DHL/UPS/FedEx is supported. Sample costs are refundable upon bulk order confirmation. Custom prototypes take 15 working days.

Q:What are the payment terms?

Standard terms are 30% T/T deposit and 70% balance against Bill of Lading. For orders under $1,000, full advance payment is recommended. LC at sight is negotiable for bulk orders.

Q:What is your quality assurance process?

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

Q:What customization options do you offer?

We offer flexible customization including full customization from samples or designs. Our capabilities cover various fasteners and solar mounting systems.

Q:What is the typical delivery time?

Normally 30-40 days. During peak season, the lead time is one month, and off-season lead time is also one month.