How do you control quality during production?

We request our QC team to inspect every production link for each batch of goods. We can also provide you with MTC and mill certificates when the goods are finished.

Can you provide free samples?

For new customers, we provide free samples for standard fasteners, but the client pays the express charges. For old customers, we send free samples and pay the express charges ourselves.

Do you accept small orders?

Yes, we accept any orders. We keep stock for various bolts (Hex, Heavy Hex, Structural) and can produce fast for nuts, threaded rods, and washers.

What is your delivery time?

Generally, if goods are in stock, delivery is within 15 days. For quantities of 1-2 containers, delivery takes 25-35 days.

What is your packing method?

Packing is 20-25kg per carton, with 36 or 48 cartons per pallet (approx. 900kg). We can produce customer logos on cartons or customize cartons according to requests.

What are your payment terms?

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

Black Finished Half Thread DIN931 Hex Head Bolt

Name: Black Finished Half Thread DIN931 Hex Head Bolt
Brand: Ningbo Steel Bolt Co., Ltd
SKU: 2109118895

Zhejiang, ChinaNingbo Steel Bolt Co., Ltd

US$0.10-1.00

1,000 Pieces

Product profile

Customization

Available

Material

Steel

Standard

DIN

Model NO.

DIN931

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 Coverage: We guarantee all products 100% qualified and support lifetime warranty.

ISO9001 Quality Control: Strict quality control from raw materials to finished products according to ISO9001 system.

OEM/ODM Services: We accept OEM/ODM and can customize cartons according to customers' requests.

Flexible Delivery Options: In-stock items delivered within 15 days; 1-2 containers take 25-35 days.

Free Samples for New Clients: Free standard fastener samples provided for new customers (buyer pays express).

MTC and Mill Certificate: We can provide Material Test Certificate (MTC) and mill certificate upon completion.

Diverse Payment Terms: Accept T/T, L/C, D/P for general orders; PayPal and Western Union for samples.

Gold Supplier Status: Gold member of Alibaba and Made-in-China with credit guarantee from Alibaba Group.

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: ≤18h

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?

The Ningbo Steel Bolt Co., Ltd is a manufacturer of fasteners factory with many years of experience in Bolts, Nuts, Threaded Rods and Washers in Ningbo, China.

Q:Are OEM/ODM services provided?

Yes, the Ningbo Bolt accepts OEM/ODM.

Q:How do you guarantee quality?

We have strict quality control from raw materials to finished products according to the ISO9001 quality management system. We guarantee all products 100% qualified and support lifetime warranty.

Q:How can I trust your company?

We are a fasteners factory in China with many years of production experience. We are a Gold member of Alibaba and Made-in-China, and we have a credit guarantee from Alibaba Group. You can place an order via Alibaba directly.

Q:What is your pricing policy?

We offer high-quality products at reasonable prices. Please send an inquiry, and we will quote you a price immediately for your reference.