What is the standard packaging?

Our standard packaging is 20-25kg per carton, with options for customized logos and cartons.

Do you accept small orders?

Yes, we accept all orders and maintain stock for various fasteners with quick production capabilities.

What certifications do you have?

Our quality control processes are in place according to ISO9001 standards, and we provide MTC and mill certificates upon completion.

Black Oxide Surface Treatment Hex Bolts

Name: Black Oxide Surface Treatment Hex Bolts
Brand: Ningbo Steel Bolt Co., Ltd
SKU: 2114065215

Zhejiang, ChinaNingbo Steel Bolt Co., Ltd

US$0.10-1.00

1,000 Pieces

Product profile

Customization

Available

Material

Steel

Standard

DIN

Model NO.

DIN6921

Application

Industry

Finish

Plain

Packing

Cartons+Plastic Bags

Head Type

Hexagon Flange Head

Surface Treatment

Black Oxide

Origin

Zhejiang, China

Production Capacity

100000 Piece/Pieces Per Month

Key features

Lifetime Warranty Support: Covers all mechanical defects with free parts and labor for the machine's entire life.

ISO9001 Certified Quality: Strict quality control processes ensuring 100% qualified products.

Black Oxide Finish: Durable surface treatment applied to steel hex bolts.

Hexagon Flange Head: Standard head type designed for secure fastening applications.

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

Fast Delivery for Stock: Stock items delivered within 15 days.

Free Samples for New Clients: Standard fastener samples provided with client covering express charges.

MTC and Mill Certificates: Quality inspection reports provided upon completion of every order.

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:Are OEM and ODM services available?

Yes, we accept OEM/ODM services with options for full customization, minor customization, and flexible customization from samples or designs.

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:Do you offer free samples?

New customers receive free standard fastener samples with express charges covered by the client. Old customers receive free samples with express charges covered by us.

Q:What payment terms do you accept?

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

Q:Is there a quality guarantee?

Yes, we have strict quality control processes according to ISO9001 standards, ensuring 100% qualified products with lifetime warranty support.

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Black Oxide Surface Treatment Hex Bolts