Carbon Steel GB21 Small Hexagon Head Bolt M8-M48 Grade 4.8

Name: Carbon Steel GB21 Small Hexagon Head Bolt M8-M48 Grade 4.8
Brand: Ningbo Yongbiao Fastener Co., Ltd
SKU: 2193144532

Zhejiang, ChinaNingbo Yongbiao Fastener Co., Ltd

US$0.005-0.10

1,000 Pieces

Sample price:US$1.00/piece.Request sample

Product profile

Customization

Available

Material

Stainless Steel

Type

Hexagon Head

Model NO.

GB21

Connection

Common Bolt

Head Style

Hexagonal

Standard

DIN, ANSI, GB, JIS, GOST, BSW

Grade

8.8

Product Name

Hexagon Head Bolt

Keywords

Non Standard Fastener

Diameter

M3-M30

Packaging

Plastic Bag / Paper Box

MOQ

10000PCS

Sample

OEM & ODM Custom

Logo Custom

Transport Package

Standard Shipping Packaging or Customized

Specification

Standard Specifications Or Customized

Trademark

YONGBIAO

Origin

Zhejiang, China

Production Capacity

5000000 PCS/Year

Key features

Extra Large Outer Diameter: Significantly larger outside diameter to distribute load and prevent structure damage.

High Hardness Grade: Manufactured to 100HV hardness grade ensuring excellent strength under heavy loads.

Versatile Material Options: Available in carbon steel, stainless steel (304/316), alloy steel, brass, and copper.

Strict Quality Certification: Certified by ISO9001 and TS16949 with 100% inspection during production.

Customizable Packaging: Standard plastic bags and paper boxes available, or customized per requirements.

OEM & ODM Services: Full customization from samples and designs with logo and trademark options.

Compliance with Standards: Manufactured in strict accordance with GB/T 5287-2002 and ISO 7094:2000.

Sample Availability: Samples are accepted for quality verification before bulk orders.

Company profile

Importers and ExportersFast DeliveryQuality AssuranceProduction Process Visualization

Ningbo Yongbiao Fastener 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 CertifiedExport Year: 1 Year CertifiedNearest Port: Ningbo Port, Shanghai PortAverage Response Time: ≤1.11h

AI-Powered supplier vetting

SummaryThe supplier is described as a medium-sized fastener manufacturer integrating R&D, production, and sales, with more than 50 employees, over 50 production machines, more than 10 testing machines, and four production lines. It provides OEM services for well-known brands and supports customization from samples and designs. Quality and service-management procedures are documented and followed, including finished-product inspection, supplier assessment, corrective and preventive action, and complaint handling. However, no SDK is available, and no overseas warehouses, showrooms, agents, branches, or offline trade-show participation are reported. Overseas service coverage is recorded as zero countries, while export-trade experience is represented by three experienced staff. Production quantity reconciliation is not continuously performed for every batch or production run. Financial records are identified for 2021–2023, but the provided information does not establish financial strength.

Supplier typeThe supplier operates as a fastener manufacturing enterprise integrating R&D, production, and sales. Its stated business scope also includes wholesale, motorcycle and bicycle parts, wire and cable management, instruments, pumps, household-appliance parts, and metal materials, while its primary market is listed as domestic.

After-Sales capabilityThe supplier has written and followed procedures for service assessment, corrective and preventive actions, and customer complaints. However, it reports no overseas warehouse, showroom, agent, branch, or offline trade-show capability, and overseas service coverage is recorded as zero countries, limiting evidence of strong international after-sales support.

Production capacityThe supplier reports four production lines, more than 50 production machines, more than 10 testing machines, over 50 employees, and screw output of 4,000 tons. Finished-product inspection instructions are uniformly followed, but continuous quantity reconciliation for each batch or production run is not performed.

Customization capabilityThe supplier explicitly supports customization from samples and designs and provides OEM services for well-known brands. These capabilities directly support customer-specific product development and manufacturing.

Product Q&A

Q:Can you send me your product catalog and price list?

There is a corresponding parameter table under each of our products for your reference. Since we have thousands of products, it is difficult to send you all the product catalogs and price lists. Please tell us the styles you are interested in and we can provide a price list for your reference.

Q:How is the quality of your products?

100% inspection during production. Our products are certified by ISO9001, and TS16949 international quality standards.

Q:What materials can you provide for your products?

Carbon steel, alloy steel, stainless steel, brass, copper, or as per your requirements.

Q:What is your packaging?

Our normal packaging is plastic bags and paper boxes, we can also package the products according to your requirements.

Q:How about the warranty?

We are very confident in our products, we pack them very well to ensure that the goods are well protected.