What is the material and finish of the bolts?

The bolts are made of carbon steel with a black oxide finish.

What is the packaging for the bolts?

Standard packaging includes cartons and plastic bags, which can be customized.

Are the products ISO9001 certified?

Yes, our manufacturing process is certified under the ISO9001 quality management system.

Black Oxide Heavy Hex Bolts for Construction

Name: Black Oxide Heavy Hex Bolts for Construction
Brand: Ningbo Steel Bolt Co., Ltd
SKU: 2113690095

Zhejiang, ChinaNingbo Steel Bolt Co., Ltd

US$0.10-1.00

10,000 Pieces

Product profile

Customization

Available

Material

Carbon Steel

Type

Hexagon Head

Model NO.

ASTM A325

Head Style

Hexagonal

Application

Machinery, Chemical Industry, Environmental, Building

Finish

Black

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: 100% qualified products come with a lifetime warranty for mechanical defects.

ISO9001 Certified: Manufacturing process certified under ISO9001 quality management system.

OEM/ODM Services: Acceptance of OEM and ODM services with flexible customization options.

Black Oxide Finish: Carbon steel bolts featuring a durable black oxide surface treatment.

Quick Delivery: Fast delivery times available for in-stock items.

Flexible Payment: Multiple payment options including T/T, L/C, PayPal, and D/P.

Customizable Packaging: Packaging can be customized to cartons and plastic bags.

Small Order Acceptance: Flexible acceptance of small orders for customer convenience.

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.