Is quality control guaranteed?

Yes, we follow ISO9001 quality management with strict inspection at every production link.

What is the minimum order quantity?

We welcome all orders, including small orders, with ample stock available for various fasteners.

Are mill certificates provided?

Yes, mill certificates and MTC are provided upon completion of your order.

Heavy-Duty Hex Head Bolts Collection

Name: Heavy-Duty Hex Head Bolts Collection
Brand: Ningbo Steel Bolt Co., Ltd
SKU: 2119751405

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.

SAE J429

Connection

Common Bolt

Head Style

Hexagonal

Standard

ASTM

Grade

Grade 2, 5, 8

Application

Machinery, Chemical Industry, Environmental, Building, Industry

Finish

Plain

Packing

Cartons+Plastic Bags

Head Type

Hexagon 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

Lifetime Warranty Support: 100% qualified products with lifetime warranty support for all mechanical defects.

ISO9001 Quality Control: Strict quality control from raw materials to finished products ensuring high standards.

OEM/ODM Services: Accepts OEM/ODM services with flexible customization options from samples or designs.

Fast Delivery for Stock: Stocked items delivered within 15 days; larger quantities take 25-35 days.

Free Samples for New Clients: New customers receive free standard fastener samples; client covers express charges.

Flexible Payment Terms: Supports T/T, L/C, D/P for general orders and PayPal/Western Union for samples.

Certified Manufacturer: Gold member with credit guarantee and mill certificates/MTC provided upon completion.

Customized Packaging: Standard 20-25kg cartons on pallets; customized packaging with logos available.

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.