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. In short, this bolt is among the most vital, if not the most vital component for maintaining the entire tunnel’s structural integrity.

A tunnel bolt is classified under the type of bolts known as structural bolts, they can be produced in various grades, sizes, and load capacities, depending on their intended use. These structural bolts also come with uniform hexagonal heads to fit all types of wrenches, whether manual or automatic, box ended or open ended.

Why choose us

01  We are a professional ,manufacturer of  segment bolt/nuts/washers, we are dedicated in kinds of railway fasteners, we can meet your customized requirements in details.

02  We have workshop, do every step from purchasing material to shipment all by our team, so our prices are the most competitive under same quality.

03  Our lead time can be adjust to match your different schedule of different products. Normally 20-30 days is available in producing, inspection, and packing.

04  We care about the safety of using our products, with all our workers and technicians working together, it is guaranteed that our railway products reach the international standards, such as AREMA,GB, BS, UIC, DIN, etc.

Product Description

Product Specifications: M16-M30 

Material: Mild Steel (4.6,5.6 grade), High Tensile (8.8 grade), Stainless Steel (304, 316 grade)

Implementation of standards: GB,DIN, AISI, ASTM, SAE, etc.

Surface treatment: black / phosphating/Plain Oiled/  Zinc Plated/Hot Dip Galvanized/Dacro coating

Performance level: 4.6,5.6,8.8,10.9 

Kunshan Alex also manufacture different sizes /grade according to customer requirements.

Quality and reliability are always our pursuit. We promise to provide replacement service for the products with non-artificial quality problems(except force majeure)during their period of quality assurance.

Quality Control

Kunshan Alex Railway Fastening Co., Ltd. is an ISO 9001/2008 certified company. All processes are in accordance with the requirements of the ISO quality management system. From raw material to the finished products, we operate in accordance with standard procedures. We have strict quality control systems for suppliers:

1. Strictly inspection and testing of raw materials

2. Regularly organize quality control coordination meetings with semi-product suppliers to provide technical support.

3.Both sampling and batch testing will be taken while producing to make sure products 100% qualified before shipment.

Certificate:

Workshop shown:

Packing for Tunnel segment bolt

1. 50lbs keg +wooden crate ; 100lbs keg +pallet; 200lbs keg +pallet
2. Woven bags in wooden crate 
3. Woven bags +plywood pallet
4. Other ways as per client's requirement

FAQ

Q: Are you manufacturer or trader?

A:We are manufacturer and trader, company located in Kunshan ,Jiangsu Province, China, about 2 hours take taxi from Shanghai airport.

Q: Do you provide samples?

A:Yes, we offer sample for approval before each order.

Q: What's your payment term?

A: 30% deposit by T/T , balance against B/L copy, Payment term is negotiable based on different order products and quantity.

Q: How long is your delivery time?

A: Generally 20-30 working days after receiving deposit or the original L/C. Could be re-schedule under really urgent case.

Q:Can we visit your factory?

A:Of course, you're warmly welcomed. Once we have your schedule, we can arrange everything in advance.

Contact details:

If you have any other questions, pls feel free to contact us as below:

Company name: Kunshan Alex Railway Fastening Co., Ltd.
Address: No.1255 Chengbei Road, Yushan town, Kunshan City, Jiangsu Province, China.
Tel: 0086 512-83639017
Fax: 0086 512- 83639019

Skype/whatsapp/wechat: 86 18914971437