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 testing, salt spray analysis, and material certification.

What is your minimum order quantity?

The minimum order quantity is 1 Kg.

Which standards do your products comply with?

Our products comply with GB, DIN, ISO, and JIS standards, including GB 51-1976.

Premium Durable Hexagon Nuts GB 51 - 1976 for Global Supply

Name: Premium Durable Hexagon Nuts GB 51 - 1976 for Global Supply
Brand: Ningbo Yinzhou Sokun Import and Export Co., Ltd.
SKU: 2246848345

Zhejiang, ChinaNingbo Yinzhou Sokun Import and Export Co., Ltd.

US$0.01-0.10

10,000 Pieces

Product profile

Customization

Available

Material

Carbon Steel, Stainless Steel,Brass

Type

Hex Nuts

Model NO.

GB 51 - 1976

Connection

Head Style

Standard

DIN, ANSI, GB, JIS, GOST, BSW

Grade

Standards

GB, DIN, ISO, JIS

Finished

Passivation, Zinc Plating, Black, Plainhdg, Yellow

Certificate

ISO9001/SGS

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: Full customization available from samples or designs.

Wide Material Selection: Carbon steel, stainless steel, brass, aluminum, and titanium alloys.

Diverse Finishing Options: Zinc plated, hot dip galvanized, dacromet, nickel plated, black oxide, and plain.

ISO Certified Manufacturer: Established in 2009 with rigorous two-stage quality assurance protocols.

Free Sample Availability: 1-3 pcs standard specification samples available with express shipping options.

Global Market Reach: Serving clients in North America, Europe, Asia, South America, Africa, and the Middle East.

Comprehensive Product Range: Industrial fasteners and solar energy installation systems.

Custom Size Options: Sizes available according to reference standards and customer requirements.

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: ≤6.82h

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 is the delivery time?

Normally in 30-40 days.

Q:Can you provide samples?

Yes, free samples (1-3 pcs) are available. Express shipping via DHL/UPS/FedEx is supported. Sample costs are refundable upon bulk order confirmation. Customized prototyping takes 15 working days.

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 USD, full advance payment is recommended. We also accept SWIFT transfer, LC at sight, PayPal, and Western Union.

Q:What materials are available for these nuts?

We offer Carbon steel, stainless steel, Brass, Aluminum, and Titanium & Alloys.

Q:Do you offer customization services?

Yes, we provide flexible customization from samples or designs, including full customization and ODM services.