What is the lead time for production?

The average lead time is 1-3 months for both peak and off-peak seasons.

What sizes are available for the tunnel bolts?

Sizes range from M1.6 to M20, with specific tunnel bolt diameters including M20, M24, M27, and M30.

Wholesale Metro Bolt Connecting Construction Bolt Subway Curved Tunnel Bolt Galvanized

Name: Wholesale Metro Bolt Connecting Construction Bolt Subway Curved Tunnel Bolt Galvanized
Brand: Maanshan Kingrail Technology Co., Ltd.
SKU: 2077238042

Anhui, ChinaMaanshan Kingrail Technology Co., Ltd.

US$0.40-0.60

100 Pieces

Product profile

Customization

Available

After-sales Service

1 Year

Warranty

1 Year

Model NO.

Wholesale Metro Bolt

Customized

Certification

ISO14001, ISO9001

Material

Q235,10b21,Stainless Steel

Standard

GB/T 1346,GB,JIS,ANSI,DIN,BS

Processing

Hot Rolling

Surface

Bronze,Zinc,Rainbow,Plain,Nickle,Passivated,Electr

Production

OEM ODM Custom

Sizes

M1.6,M2,M2.5,M3,M3.5,M4,M5,M6,M8,M10-M20

Head Type

Hexaonal Head/Double End Head

Drive Type

Slotted(Socket),Square,Pz,Triangle,H,Torx(

Heat Treatment

Tempering,Hardening,Stress Relieving,etc.

Application

Railway,Subway,Tunnel Building

Grade

4.8,5.6,8.8.10.9,12.9

Quality Control

Inspection 100%

Coating

Plain, Zinc Plated, Hot DIP Galvanized.

Thread

Half or Full Thread

Material 2

Stainlesss Steel, Carbon Steel, Q235

Transport Package

Wooden Box/Pallet

Specification

Tunnle Segement Bolt

Trademark

Kingrail Parts

Origin

China

HS Code

86080090

Production Capacity

50000PCS/Year

Key features

Customized Manufacturing: Available in various grades, sizes, load capacities, and materials per customer requirements.

Comprehensive Coating Options: Includes Zinc Galvanised, Hot dip galvanized, Dacromate coating, and more for corrosion resistance.

Wide Material Selection: Manufactured from Mild Steel, High Tensile, Stainless Steel (304, 316), and Carbon Steel.

ISO and CRCC Certified: Both factories hold ISO and CRCC certifications ensuring high quality and reliability.

20+ Years Industry Experience: Over 20 years specializing in railway fasteners with global market presence.

1 Year Warranty Coverage: Provides a 1-year warranty for all mechanical defects and product quality.

Full Thread Options: Available in both Half Thread and Full Thread configurations for diverse applications.

Global Market Service: Serving demanding markets worldwide including USA, Europe, South America, and Asia.

Company profile

Importers and ExportersHigh Repeat Buyers Choice

Maanshan Kingrail Technology Co., Ltd.

Anhui, China

Business Type: Manufacturer/FactoryAverage Response Time: ≤2.31h

AI-Powered supplier vetting

SummaryThe supplier is identified as a trading company with business activities covering metal-product research and development, technical services, key systems and components, railway rolling stock parts, and related equipment sales. It reports ISO 9000 and ISO 9001 certification, OEM service for well-known brands, ODM capability, and broad customization options. Reported production capacity includes wheels, track materials, and metal products, while quality-control and traceability evidence is incomplete. The supplier has one R&D engineer, no new products reported in the past year, no available SDK, and no R&D audit documentation. After-sales service is included in the R&D engineer’s responsibilities, but documented complaint-handling and corrective-action records are absent. No monetary or financial figures are included in this assessment; the available records only identify financial information for three historical years. Overseas service infrastructure is limited, with no overseas agents, branches,...

Supplier typeThe supplier is explicitly classified as a trading company. Its stated activities include metal-product R&D and technical services, as well as sales of key systems, railway rolling stock parts, and related equipment.

CertificationsThe supplier reports ISO 9000 and ISO 9001 management-system certifications. However, quality assurance status is unspecified, and approved-supplier, corrective-action, and complaint-handling records are incomplete or undocumented.

Production capacityReported annual capacity includes 20,000 wheels, 10,000 tons of track materials, and 800 tons of metal products, supported by 11–20 quality-control staff and ISO certifications. However, the supplier states it has no in-stock service capacity, while raw-material traceability and outsourcing controls remain unknown.

Customization capabilityThe supplier explicitly offers customization from samples, customization from designs, full customization, and minor customization, and also provides ODM services. These statements directly support broad customization capability.