Do you provide quality certificates?

Yes, every production link is inspected, and MTC and mill certificates are provided upon completion.

What is the warranty policy?

We ensure 100% qualified products with lifetime warranty support under our ISO9001 quality management system.

How are the products packaged?

Products are packed in 20-25kg cartons, with customization options available for logos or specific requirements.

Hexagon Socket Black Oxide Fasteners

Name: Hexagon Socket Black Oxide Fasteners
Brand: Ningbo Steel Bolt Co., Ltd
SKU: 2120989145

Zhejiang, ChinaNingbo Steel Bolt Co., Ltd

US$0.10-1.00

1,000 Pieces

Product profile

Customization

Available

Material

Steel

Type

Hexagon Head

Model NO.

DIN7991

Connection

Common Bolt

Head Style

Hexagonal

Standard

DIN

Grade

8.8, 10.9, 12.9

Application

Machinery, Chemical Industry, Environmental, Building, Industry

Finish

Plain

Packing

Cartons+Plastic Bags

Head Type

Hexagon Flange Head

Surface Treatment

Black Oxide

Transport Package

Carton+Pallet

Specification

M6-M100

Trademark

ningbo-bolt

Origin

Zhejiang, China

Production Capacity

100000 Piece/Pieces Per Month

Key features

High Grade Options: Available in Grade 8.8, 10.9, and 12.9 for superior strength.

DIN Standard Compliance: Manufactured according to DIN7991 standard for precision fit.

Black Oxide Finish: Surface treated with black oxide for enhanced corrosion resistance.

OEM/ODM Services: Full customization available from samples, designs, or minor adjustments.

ISO9001 Certified: Strict quality control ensures 100% qualified products with lifetime warranty.

Fast Delivery: Stock items delivered within 15 days; large orders in 25-35 days.

Free Samples: New customers get free samples; express charges covered by client.

MTC & Certificates: Mill test certificates provided upon completion of every production link.

Company profile

High Repeat Buyers Choice

Ningbo Steel Bolt Co., Ltd

Zhejiang, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 6 Years CertifiedNearest Port: Ningbo PortAverage Response Time: ≤15h

AI-Powered supplier vetting

SummaryThe supplier is identified as a professional technical supplier and operates as a combined company involved in producing and selling fasteners, hardware products, auto parts, and oil pipeline fittings. It supports extensive product customization, including samples, designs, full customization, minor customization, and flexible customization. The supplier reports two production lines and one presence in a main export market, with an average lead time of one month in both peak and off-season periods. However, it lacks 3D software design services, SDK availability, in-stock capacity, overseas warehouses, overseas agents or branches, and offline trade-show participation. Finished products are checked by packing staff, while no written procedures or records are used for assessing service capability. The provided information does not establish certifications, financial strength, after-sales performance, or customer case history.

Supplier typeThe supplier is explicitly identified as a professional technical supplier. It is a combined company whose stated business scope includes production and sales of fasteners, hardware products, auto parts, and oil pipeline fittings, as well as related import and export activities.

R&D capabilityThe supplier is identified as having professional technical research and development capability, and it offers multiple forms of customization. However, it explicitly does not provide 3D software design services and has no available SDK, so the evidence supports technical customization but not broader digital or software innovation capability.

Production capacityThe supplier reports two production lines, one-month average lead times in both peak and off-season, and six years of exporting experience. Countervailing controls are limited: finished products are checked by packing staff, there is no continuous quantity reconciliation for each batch or production run, no outsourcing SOP, no valid manufacturing-capacity contract with related subcontractors, and no in-stock capacity.

Customization capabilityThe supplier explicitly supports customization from samples, customization from designs, full customization, minor customization, and flexible customization. This is direct evidence of broad product-design and modification capability, although 3D software design services are not available.

Product Q&A

Q:What grades are available for these fasteners?

We offer Grade 8.8, 10.9, and 12.9 to meet various strength requirements.

Q:Do you accept OEM and ODM orders?

Yes, we provide full customization options including customization from samples, designs, and flexible minor customization.

Q:What is the delivery time for stock items?

Stock items can be delivered within 15 days, while larger quantities may take 25-35 days.

Q:Can I get free samples?

New customers can receive free samples for standard fasteners, with express charges covered by the client. Existing customers receive free samples with express charges covered by the company.

Q:What payment methods do you accept?

We accept T/T, L/C, D/P for general orders, and Paypal or Western Union for small or sample orders.