What surface treatments are available?

Options include Plain, Zinc Plated, Hot DIP Galvanized, Dacromate coating, and others like Nickel and Passivated.

What is the lead time for production?

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

Where are the manufacturing facilities located?

We have two factories located in Ma'anshan, China, specializing in railway fasteners.

Galvanized Tunnel Construction Bolt with Washer Spear Tunnel Bolt for Tunnel Construction

Name: Galvanized Tunnel Construction Bolt with Washer Spear Tunnel Bolt for Tunnel Construction
Brand: Maanshan Kingrail Technology Co., Ltd.
SKU: 2077201442

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.

Tunnel Construction 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

Comprehensive Customization: Available in various materials, sizes, grades, and coatings per customer drawings.

Dual Certification: ISO9001, ISO14001, and CRCC certified for high-quality railway fasteners.

1-Year Warranty: Includes 1-year after-sales service coverage for all mechanical defects.

Wide Size Range: Sizes from M1.6 to M30 with lengths up to 500mm available.

Diverse Coating Options: Zinc Galvanised, Hot DIP Galvanized, Dacromate, and other surface treatments.

High-Grade Materials: Mild Steel, High Tensile, and Stainless Steel (304, 316) grades available.

100% Quality Control: Strict inspection process ensures 100% quality for all tunnel bolts.

Global Market Experience: Serving demanding markets in USA, Europe, Asia, and South America for 20+ years.

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.