Concrete Ring Connect Bolt for Tunnel

Material: Carbon Steel


Connection: Common Bolt


Standard: DIN, ANSI, GB, JIS, BSW, GOST


Application: Building


Raw Material: Q235, 35#, 45#, 35CrMo, 42CrMo, 40cr


Std No.: Uic,DIN,BS,GB,JIS,etc


Grade Data: 4.6, 4.8, 6.8, 8.8, 10.9


Inspection: Internal and 3rd Parties


Sample Policy: Sample Free, Freight Collect


Trademark: ALEX


Origin: Suzhou, Jiangsu




Type: Concrete Ring Connect Bolt for Tunnel


Head Style: Hex


Grade: Customized


Finish: Hot Galvanizing


Certificate: ISO9001:2008


Surface Finish: Plain, Black, Phosphate, Zinc , HDG


Process Control: Internal


Inspection Reports: Chemical Composition, Physical Property and Sizes


Production Update: Weekly Reports Will Be Provided


Specification: UIC, DIN, BS, GB, JIS, etc


HS Code: 7318150000




Application:Permanently fix concrete tunnel segment

Material:	Q235	35#	45#	35CrMo	42CrMo	40Cr
Grade:	4.6	4.8	6.8	8.8	10.9	12.9

Material: Carbon steel or stainless steel----Q235, 35#, 45#, 35CrMo, 42CrMo, 40Cr etc.



Specification:Complete range from M16 to M30 diameters without Length limit.



Finishing;plain(oiled),sherardized,hot dip galvanized, white zink plated, yellow zink plated, black, dacromet, geomet or others specified by the customers



high quality curve Spear tunnel Bolt for concrete ring

There are 3 senior national class engineers, 5 engineers and 8 assist engineers, they are working hard on R&D and improvement of rail fastenings for each field. We already awarded 18 patents on metro railway fastening system, tramway fastening systems, and performed widely. We are also the testing base of Southwest Transportation University regarding to rail fastening systems; we also cooperated with Shanghai Tongji University regarding the research and developing about vibrating reduction, wave friction reduction to rail tracks fields and award several leading results.



Kunshan Alex Railway Fastening Co., Ltd manufactures railway fasteners and standard components. As a leading railway fasteners manufacturers in China,with production license of Chinese railway Ministry, advanced technology, high precision inspection instruments and service, our products have been widely exported the USA, Germany, Spain, Japan, Australia, Italy, Netherlands, Belgium, Poland, the UK, India, and South Africa etc.



We can provide products according to customers drawings and samples.Our main products are as following:



1. Elastic Rail Clip And Clamp, SKL clip,E Clip, Deenik clip, Fist clip;

2. Rail Screw Spike/coach screw/drive screw/ Dog Spike ;

3. Plastic Dowel/screw dowel;

4. Track Bolt with Nut;

5. Rail Base (Tie) Plate;

6. Rail Fish Plate, Fish Bolt, nut and washers;

7. Railway Shoulder (Insert);

8. Railroad Rubber and EVA Pad;

9. Rail Spring Washer, Rail plain washer;

10. Rail Clamp plate;

11. Train Block shoe/ Brake Block ;

12. Rail Anchor;

13. Rail Shoulder;

14. Steel Rail ;

15. Steel Sleeper.

Contact us if you need more details on Hollow Drilled Bolt. We are ready to answer your questions on packaging, logistics, certification or any other aspects about Torx Head Bolt、Zinc Plated. If these products fail to match your need, please contact us and we would like to provide relevant information.

Product Categories : Special Fasteners > Special Fasteners