How do you control quality?

Our QC team inspects every production link for each batch of goods. We provide Material Test Certificates and mill certificates upon completion.

Do you provide free samples?

New customers can request free samples of standard fasteners, with express charges covered by the client. Returning customers receive free samples with express charges covered by us.

Do you accept small orders?

Yes, we accept orders of any size and maintain stock for various fasteners. We can also produce items quickly upon request.

What is your delivery time?

If items are in stock, we can deliver within 15 days. For larger quantities, delivery may take 25-35 days.

How do you pack products?

Our standard packing is 20-25kg per carton, with 36 or 48 cartons per pallet. Customized packaging with logos is available upon request.

What are your payment terms?

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

Black Oxide Hex Head Industrial Screws

Name: Black Oxide Hex Head Industrial Screws
Brand: Ningbo Steel Bolt Co., Ltd
SKU: 2116084985

Zhejiang, ChinaNingbo Steel Bolt Co., Ltd

US$0.10

1,000 pieces

Product profile

Customization

Available

Material

Steel

Type

Countersunk Head

Model NO.

DIN7991

Connection

Common Bolt

Head Style

Counter Sunk Bolt

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

Diverse Grade Options: Available in Grade 8.8, 10.9, and 12.9 to meet various strength requirements.

Black Oxide Finish: Provides enhanced corrosion resistance with a professional black oxide surface treatment.

OEM and ODM Services: Full customization available including head types, surface treatments, and packaging.

Lifetime Warranty: Covers all mechanical defects with a comprehensive lifetime warranty for peace of mind.

ISO9001 Certified Quality: Strict quality control from raw materials to finished products ensuring 100% qualified goods.

Material Test Certificates: Includes mill certificates and QC inspection reports for every production batch.

Flexible Sample Policy: Free samples for new customers (client pays express) and returning customers (free express).

Fast Delivery Options: Stock items delivered within 15 days; larger quantities shipped in 25-35 days.

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 you a manufacturer or trading company?

Ningbo Steel Bolt Co., Ltd is a manufacturer of fasteners with extensive experience in producing Bolts, Nuts, Threaded Rods, and Washers in Ningbo, China.

Q:Do you provide OEM/ODM services?

Yes, Ningbo Steel Bolt Co., Ltd accepts OEM/ODM orders.

Q:How do you guarantee quality?

We maintain strict quality control measures from raw materials to finished products, following the ISO9001 quality management system. We ensure that all products are 100% qualified and offer a lifetime warranty.

Q:How can I trust you?

Ningbo Steel Bolt Co., Ltd is a reputable fasteners factory in China with years of experience. We are a Gold member of *** and Made in China, with credit guarantees from *** Group. You can place orders directly through ***.

Q:What about your pricing?

We offer high-quality products at competitive prices. Contact us for a quote, and we will provide pricing promptly.