How do you control quality?

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

Do you provide free samples?

New customers can receive free samples for 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. Custom production is also available.

What is your delivery time?

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

How do you pack your 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 accepted payment methods?

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

Heavy Duty Black Oxide Hex Bolts

Name: Heavy Duty Black Oxide Hex Bolts
Brand: Ningbo Steel Bolt Co., Ltd
SKU: 2113649715

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.

A307

Connection

Common Bolt

Head Style

Hexagonal

Standard

Custom

Grade

Grade a

Application

Machinery, Chemical Industry, Environmental, Building, Industry

Finish

Plain

Packing

Cartons+Plastic Bags

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

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

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

Customized Packaging: Standard 20-25kg per carton with option for customized packaging featuring logos.

OEM/ODM Services: Accepts OEM and ODM orders with flexible customization from samples and designs.

Free Samples for New Clients: New customers receive free standard fastener samples (client covers express charge).

MTC and Mill Certificates: Quality certificates provided for every batch after QC inspection of all production links.

Fast Delivery for Stock Items: In-stock goods delivered within 15 days; larger quantities take 25-35 days.

Flexible Payment Options: Accepts T/T, L/C, D/P for general orders and PayPal, Western Union for small orders.

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 fasteners factory 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 adhere to strict quality control measures from raw materials to finished products, following the ISO9001 quality management system. We ensure 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.

Q:What about your pricing?

We offer high-quality products at competitive prices. Contact us for a quote.