What surface treatments are offered?

Surface treatments include Plain, Black Oxide, Zinc Plated (Yellow), and Hot Dip Galvanized (H.D.G.).

What is the delivery time for orders?

The delivery time is typically 3-15 working days.

What is the minimum order quantity (MOQ)?

The minimum order quantity is 50 pieces.

Customized Curved Tunnel Bolt for Shield Construction

Name: Customized Curved Tunnel Bolt for Shield Construction
Brand: Liaocheng Jinyuyuan Metal Products Co., Ltd.
SKU: 2155754952

Shandong, ChinaLiaocheng Jinyuyuan Metal Products Co., Ltd.

US$0.50-5.00

1,000 Pieces

Product profile

Customization

Available

Material

Stainless Steel

Type

Hexagon Head

Model NO.

Curved bolt

Connection

Common Bolt

Head Style

Round

Standard

DIN, ANSI, GB, JIS, BSW, GOST

Grade

10.9

Application

Machinery, Chemical Industry, Environmental, Building

Finish

Ordinary

Material Type

Carbon Steel or Stainless Steel

Surface Treatment

Galvanized or Hot DIP Galvanized

Bolt Shape

L Type or J Type

Thread Type

Full Thread or Partial Thread

Diameter Range

M6 to M36 Available

Length Range

Custom Length Supported

Strength Grade

4.8 8.8 or Higher

Application Use

Concrete Foundation Anchoring

Customization Service

Size Shape Customization

Corrosion Resistance

Long Term Outdoor Use

Transport Package

Woven Bags/Wooden Boxes or as Required

Specification

customizable

Trademark

Jinyuyuan

Origin

China

Key features

Customizable Specifications: Supports custom material, shape, thread, and length to meet specific project needs.

High Anti-Corrosion Performance: Made of high-quality steel with hot-dip galvanizing for excellent corrosion resistance.

Specialized Curved Design: Arc-shaped design ensures stable splicing and effective force transmission for tunnel segments.

Direct Factory Pricing: Sold directly from the factory, offering discounted prices without trading company markups.

Strict Quality Control: 100% product testing before shipment with strict control over every production process.

Flexible Customization Options: Offers full customization, minor customization, and flexible options from samples or designs.

Company profile

High Repeat Buyers ChoiceQuality Assurance

Liaocheng Jinyuyuan Metal Products Co., Ltd.

Shandong, 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. CertifiedNearest Port: Qingdao PortAverage Response Time: ≤5.12h CertifiedTerms of Payment: T/T, LC, D/P, etc.

AI-Powered supplier vetting

SummaryThe supplier presents documented quality and management certifications, including CE, ISO9001:2015, ISO45001:2018, and ISO14001. It reports broad customization and ODM/OEM capabilities, recent new-product activity, three R&D engineers, and equipment for pipe cutting, pressing, and punching. Service processes for approved suppliers, corrective actions, complaints, and finished-product inspection are documented and followed. However, overseas service coverage is limited: there are no overseas agents, branches, warehouses, showrooms, or reported overseas-service countries, and the supplier has not participated in offline trade shows. Manufacturing capacity also lacks a valid contract with related subcontractors. Financial assessment is inconclusive because the provided data is sparse and includes a current ratio stated as zero, without sufficient context to establish overall financial credibility.

Supplier typeThe supplier operates a production and sales system that includes a grouting sleeve factory, a flattened bundle mouth sleeve factory, and an auxiliary-material product warehouse. Its registered and factory addresses are in Liaocheng, Shandong, while an office is also listed at a local innovation and entrepreneurship base, indicating a manufacturer with supporting sales and warehousing operations.

CertificationsThe supplier reports CE product certification and ISO9001:2015, ISO45001:2018, and ISO14001 management-system certifications. These are explicit certifications relevant to product compliance, quality, occupational safety, and environmental management.

After-Sales capabilityThe supplier has documented and followed procedures for corrective and preventive actions and customer complaints, and describes professional customer-service capabilities. However, it has no overseas agents or branches, overseas warehouse, overseas showroom, or reported overseas-service countries, limiting its demonstrated international service reach.

R&D capabilityThe supplier reports new-product activity during the past year, has three R&D engineers, provides ODM services, and offers multiple design-based customization modes. It does not have an available SDK, but that limitation does not by itself negate its stated product-development capability.

Production capacityProduction-related evidence includes pipe cutting, pressing, and punching machines, instructions that are uniformly followed for finished-product inspection, in-stock capability, and a stated quality assurance capability. A material weakness is that the factory and related subcontractor do not have a valid manufacturing-capacity contract, creating a documented capacity-governance gap.

Customization capabilityThe supplier explicitly offers customization from samples, customization from designs, full customization, minor customization, and flexible customization. It also reports ODM and OEM services, including OEM service for well-known brands, providing strong direct evidence of broad customization capability.

Product Q&A

Q:Are you a trading company or a manufacturer?

We are a factory and sell directly at a discounted price.

Q:How long will it take to receive the goods?

Usually it takes 3-7 days, depending on the quantity

Q:How to ensure product quality?

We strictly control every production process and ensure that products undergo 100% testing before shipment. Samples can also be shipped, but you will need to bear the cost.

Q:What after-sales services are available after purchase?

Provide online technical guidance, including installation process consultation Welcome to call anytime, looking forward to working with you!

Q:What materials are available for the curved tunnel bolt?

Available materials include Carbon Steel, Alloy Steel, and Stainless Steel.