How do you control quality?

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

Do you offer 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, ensuring prompt delivery.

What is your delivery time?

Typically, we can deliver in-stock goods within 15 days. Larger quantities 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 payment terms?

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

Metric Studs ASTM A320 Heavy Hex Bolts

Name: Metric Studs ASTM A320 Heavy Hex Bolts
Brand: Ningbo Steel Bolt Co., Ltd
SKU: 2115966445

Zhejiang, ChinaNingbo Steel Bolt Co., Ltd

US$0.10-1.00

1,000 Pieces

Product profile

Customization

Available

Material

Steel

Surface Finishing

Zinc Plated

Model NO.

ASTM A320

Grade

4.8, 6.8, 8.8, 10.9, 12.9

Certification

ISO

Customized

Studs Type

Metric Studs B1=1.25D

Finish

Zinc

Application

Industry

Customized Support

OEM

Surface Treatment

Black Oxide

Transport Package

Carton

Specification

M6-M100

Trademark

ningbo-bolt

Origin

Ningbo, China

Production Capacity

100000 Piece/Pieces Per Month

Key features

OEM/ODM Customization: Supports full customization including samples, designs, and minor adjustments.

Lifetime Warranty: Covers all products with lifetime warranty support for peace of mind.

ISO Certified Quality: Strict ISO9001 quality control with MTC and mill certificates provided.

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

Free Samples Available: Free standard fastener samples for new customers; return customers get free shipping.

Flexible Payment Terms: Accepts T/T, L/C, D/P, PayPal, and Western Union for various order sizes.

Manufacturer Direct: Direct factory in Ningbo with 6 years export experience and 26 employees.

Wide Grade Range: Available in grades 4.8, 6.8, 8.8, 10.9, and 12.9 for diverse applications.

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 manufacturer of fasteners with years of 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 maintain strict quality control from raw materials to finished products following the ISO9001 quality management system, ensuring all products are 100% qualified with lifetime warranty support.

Q:How can I trust you?

As a reputable fasteners factory in China with years of production experience, we are a Gold member of *** and Made in China, backed by credit guarantees from *** Group.

Q:What about your pricing?

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