What is your delivery time?

For in-stock items, we can deliver within 15 days. Larger quantities may take 25-35 days for delivery.

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, while PayPal and Western Union are accepted for small or sample orders.

Heavy Nut Hex Black Finish ASTM

Name: Heavy Nut Hex Black Finish ASTM
Brand: Ningbo Steel Bolt Co., Ltd
SKU: 2116473575

Zhejiang, ChinaNingbo Steel Bolt Co., Ltd

US$0.10-1.00

1,000 Pieces

Product profile

Customization

Available

Material

Steel

Standard

ANSI

Model NO.

A563

Grade

6 8 10

System of Measurement

Metric

Product Name

Hex Nut

Measurement System

Metric

Finish

Zinc/Black Plated/HDG

Application

General Industry

Origin

Zhejiang, China

Production Capacity

100000 Piece/Pieces Per Month

Key features

OEM/ODM Customization: Accepts OEM/ODM orders with full customization from samples or designs.

Lifetime Warranty: Provides lifetime warranty support for all products with 100% qualified guarantee.

ISO9001 Quality Control: Strict ISO9001 system with MTC and mill certificates for every batch.

Fast Delivery: In-stock items delivered within 15 days; larger orders in 25-35 days.

Flexible MOQ: Accepts orders of any size with stock maintained for various fasteners.

Free Samples: Free standard fastener samples available for new and returning customers.

Competitive Pricing: High-quality products offered at competitive prices with tailored quotes.

Custom Packaging: Standard packing available with customized packaging options upon request.

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: ≤24h

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, following the ISO9001 quality management system from raw materials to finished products, ensuring 100% qualified products with lifetime warranty support.

Q:What about your pricing?

We offer high-quality products at competitive prices. Contact us for a quote tailored to your needs.

Q: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.