Heavy-Duty Concrete Ring Connect Bolt Q235 45# Spear Bolts for Tunnel Construction

• Customization: Available
• After-sales Service: 1 Year
• Warranty: 1 Year
• Model NO.: Concrete Ring Connect Bolt
• Customized: 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
• Package Size: 50.00cm * 50.00cm * 50.00cm
• Package Gross Weight: 50.000kg

Product Description

Product Description

 

Tunnel bolt's make transportation through undersea and underground tunnels possible by holding together the numerous metal beams and posts, which make up the tunnel's frame.

Kingrail Parts is the largest railway fastener manufacturer in China, we can produce segment bolts in various grades, sizes and load capacities. These structural tunnel bolts also come with a unified hexagonal head to fit all types of wrenches, whether manual or automatic, box or open end.

Specifications:

Surecon is capable of manufacturing Tunnel bolts with the following specs
Size / Diameter	M 20, M 24, M 27 & M 30
Length	upto 500 mm long
Material	Mild Steel (4.6,5.6 grade), High Tensile (8.8 grade), Stainless Steel (304, 316 grade)
Coating	Zinc Galvanised, Hot dip galvanized, Dacromate coating, etc.
Customised	Surecon can also manufacture bolts as per customers requirements / drawings

Company Profile

 

KINGRAIL PARTS
Kingrail Parts  is an enterprise manufacturing railway fasteners, whose products cover fields of railway, urban rail, mining, etc.

There are two factories located in Maanshan China, which are all CRCC and ISO certificated, with a total area of about 320,000 , workers over 300, and an annual sales volume of over RMB 200,000,000.

Founded in 2005, With over 20 years of specializing in railway fasteners, Kingrail Parts has served many demanding markets worldwide, including USA States, Chile, Argentina, Ecuador, Brazil, Thailand, Indonesia, Malaysia, Vietnam, Spain, Italy, Romania, England, Kazakhstan, etc.

Our Certificates
With ISO and CRCC certificated, Kingrail Parts tries its full efforts to save cost for each client by upgrading our Production Equipment & Inspection Facility & Quality Management System to be more efficient, economy, and also with good quality control capacity. Quality and reliability are always our culture. We will never stop upgrading and developing, and will spend our whole life in delivering best quality and service.
 

Contact us

 

If you have metro tunnel construction and maintenance projects, please contact us. We will give you the best solution for tunnel segment bolts.