What is the delivery time?

Standard parts take 7-45 days. Non-standard parts take 25-45 days. We aim to deliver as soon as possible while guaranteeing quality.

How to custom-made (OEM/ODM)?

If you have a new product drawing or a sample, please send it to us. We can custom-make the hardware according to your requirements.

Carbon Steel Black Oxide Square Head Flange Bolt M16*40mm

Name: Carbon Steel Black Oxide Square Head Flange Bolt M16*40mm
Brand: WELLBOLT CO., LTD.
SKU: 2293467365

Zhejiang, ChinaWELLBOLT CO., LTD.

US$0.30

1,000-29,999 Pieces

US$0.15

30,000-49,999 Pieces

US$0.10

50,000-99,999 Pieces

US$0.05

100,000+ Pieces

Product specifications

M16 x 40mm

Sample price:US$1.00/piece.Request sample

Product profile

Customization

Available

Material

Carbon Steel

Type

Square Head

Model NO.

Carbon Steel-Threaded-M16*40mm

Connection

Common Bolt

Head Style

Square

Standard

DIN, ANSI, GB, BSW

Grade

8.8

Application

Machinery, Chemical Industry

Finish

Black

Transport Package

25 Kg Per Carton, 36 Cartons Per Pallet

Specification

M16 x 40mm

Trademark

WELLBOLT

Origin

China

HS Code

7318120000

Production Capacity

2000tons Screw Eyes Per Year

Key features

Customizable Design: Size and material can be customized as per request and design.

High Precision Parts: Strictly follows drawing tolerances to ensure high precision.

Durable Material: Made of Carbon Steel Grade 8.8 with black oxide finish.

Corrosion Resistant: Features chemical resistance and wear and tear resistance.

ISO 9001 Certified: All processes strictly adhere to ISO9001:2008 quality procedures.

OEM/ODM Service: Supports custom-made hardware based on customer drawings or samples.

Wide Application: Suitable for machinery and chemical industry applications.

Free Samples: Free samples available for testing and quality verification.

Company profile

Importers and ExportersHigh Repeat Buyers Choice

WELLBOLT CO., LTD.

Zhejiang, China

Business Type: Manufacturer/FactoryExport Year: 2010-03-01Nearest Port: shanghaiAverage Response Time: ≤3.74hTerms of Payment: LC, T/T, D/P, etc.International Commercial Terms(Incoterms): FOB, CFR, CIF, DDP, EXW

AI-Powered supplier vetting

SummaryWELLBOLT CO., LTD. is identified as a Chinese manufacturer/factory producing fasteners and metal products. It has professional technical, 3D design, ODM, OEM, and sample/design customization capabilities, but reported no new products in the past year and no available SDK. Service management is supported by written procedures and records for supplier assessment, corrective actions, and complaint handling. The company holds a valid import/export license and has six years of export experience, with exports representing 51%–70% of total sales. However, it reports no overseas warehouses, showrooms, agents/branches, or offline trade-show participation, and overseas service coverage is recorded as zero countries. Financial records are referenced for recent years, but no financial results are provided. Certification holdings, production scale, and customer cases are not sufficiently documented; employee count is six, but this alone does not establish production capacity.

Supplier typeWELLBOLT CO., LTD. is explicitly identified as a manufacturer/factory and as a fasteners and metal production manufacturer and exporter located in Haiyan County, Zhejiang, China. It is a limited company and is not part of a larger company group.

CertificationsThe supplier is stated to possess a valid import/export license. No other certifications are identified in the provided information, so broader certification coverage cannot be assessed.

After-Sales capabilityThe supplier has written procedures and followed records for customer complaint handling, corrective and preventive actions, and service-capability assessment. However, it has no overseas warehouse, showroom, agent or branch, and its overseas service coverage is recorded as zero countries, limiting evidence of international after-sales presence.

R&D capabilityThe supplier provides professional technical R&D support, 3D software design, ODM services, and customization from samples or designs. However, it reported no new products in the past year and no available SDK, so evidence supports design and development services but not recent product innovation.

Production capacityThe supplier is explicitly classified as a manufacturer/factory producing fasteners and metal products, with export licensing and six years of export experience. Nevertheless, the employee count is six and no production capacity, equipment, output, or throughput data is provided, preventing a full assessment of manufacturing scale.

Customization capabilityThe supplier explicitly offers customization from samples and designs, 3D software design services, ODM services, and OEM services for popular brands. These statements provide direct evidence of product and design customization capability.

Client casesThe supplier states that it provides OEM services for popular brands, which indicates experience serving brand customers. No customer names, project details, order history, or verifiable case studies are provided.

Product Q&A

Q:Why choose Wellbolt?

To provide first-class services in supplying quality fasteners while minimizing costs. We aim to be your first choice through professional customer service, technological innovation, and reasonable pricing.

Q:How is quality ensured?

All processes strictly adhere to ISO9001:2008 procedures. We maintain strict quality control from production to delivery, supported by experienced managers and strong technology support.

Q:What if I cannot find the product on your website?

You can send pictures, photos, or drawings via email for us to check. We develop new models monthly. Alternatively, you can send samples by DHL/TNT, and we will develop a new model specifically for you.

Q:Can you strictly follow the tolerance on the drawing?

Yes, we can. We provide high precision parts and manufacture them exactly according to your drawings.

Q:How should I order and make payment?

Payments are made by T/T. For samples, 100% payment is required with the order. For production, a 30% deposit is paid by T/T before production, and the balance is paid before shipment.