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When it comes to Tension Control Structural Bolts, JM Hardware® is the trusted screw manufacturer that delivers quality, precision, and performance. Whether you need standard TC bolts or customized solutions, we’re here to support your project with reliable products and exceptional service.




Different types for Tension Control Structural Bolt Available at JM Hardware®




JM Hardware® TC Bolts

JM Hardware®  Twist-Off Bolt

JM Hardware®  Shear Bolts


Materials Available at JM Hardware® Used in Tension Control Structural Bolts Manufacturing


Our concrete screw manufacturer capabilities allow us to offer screws in a wide variety of materials, tailored to perform in different environmental conditions:

               
Carbon Steel

A strong and  economical choice, suitable for general-purpose applications.


               
Stainless Steel (SS304, SS316)

Provides  excellent corrosion resistance, making it ideal for outdoor or  high-humidity environments, such as coastal or marine applications.


               
Hardened Steel

Often used for heavy-duty applications, offering high strength and resilience for load-bearing connections.

               
Alloy Steel

Known for its high tensile strength, alloy steel is ideal for applications where additional strength is required.

Surface Treatments for Tension Control Structural Bolts Available at JM Hardware®


The performance and durability of our Tension Control Structural Bolts are enhanced with various surface finishes. Common options include:


               
Hot-Dip Galvanizing

Offers superior corrosion  protection, ideal for outdoor or marine environments.



               
Black Oxide Coating

Provides moderate corrosion  resistance and a sleek appearance, often used in indoor applications.


               
Zinc Plating

A cost-effective solution for moderate corrosion resistance in general environments

Grades of Tension Control Structural Bolts  Available at JM Hardware®

We manufacture TC bolts in various grades to meet diverse project requirements. Our bolts conform to industry standards, including


               
ASTM A325

Commonly used for structural steel connections.

               
ASTM A490

High-strength bolts for heavy  structural applications.


               
BS 7419

British standard high-strength structural bolts

               
DIN 6914

German standard for structural bolts with hexagon heads


Common Application Scenarios


Our concrete screws are used in a range of applications, making us a preferred screw manufacturer across industries:



               
Bridges

Ensures strong and reliable  connections in high-stress load-bearing areas.


               
Highway Structures

Used in guardrails, overpasses, and support frames

               
Steel Frame Buildings

Secures beams and columns in large-scale construction projects

               
Industrial Plants

Used in heavy machinery installations and equipment support structures.

               
Power Plants

Provides secure connections for turbines, boilers, and other critical equipment.

               
Offshore Platforms

Resists harsh environmental conditions in oil and gas facilities.






Production equipment
       
                       
Various punche
                         
Large heat treatment  line
Automatic shamfering machine  


                          
                       
                        



Testing Equipment
       
                       
Universal tensile machine
                       

Rockwell hardness tester

 V hardness tester

Grinding machine, cutting machine 
                       
   
Test report

                

JM Hardware® provides each batch of products with a finished product test report issued by our laboratory. If you need a test report issued by a third party, please inform us separately. The following two templates are for reference


SGS  testing report
Third-party testing report
                              
Packing
   
           



           


      



   



   



   



   

  


Certificate
       
                       
ISO certificate
   
                       
 USA Trade Mark     
                       
EU Trade Mark
     
UK Trade Mark
   
                       
SGS Certificate
   
                       
Alibaba 15 Years Supplier
   
                       
Certificate
   
                       
   Certificate
Valued Partners


JM Hardware @ has exported its hardware parts to over 85 countries around the world.

We will make unremitting efforts to provide hardware parts with high quality and reasonable prices for our customers.

    



 Why Choose JM Hardware® as Your Concrete Screw Manufacturer?

At JM Hardware®, we are dedicated to producing concrete screws that exceed industry expectations. 


For all your concrete screw needs, JM Hardware® is the trusted screw manufacturer that delivers on quality, durability, and performance. Whether you’re working on construction, infrastructure, or industrial projects, our wide range of concrete screws is designed to meet your specific requirements. Contact us today to learn more about our products or to request a custom solution tailored to your project.






Product Introduction

Tension Control Bolts, TC Bolts or Twist Off Bolts Tension Control Bolts TC Bolt Twist off Bolt A325 A490 domestic are now the most popular choice in high-strength structural bolting and formally recognized by the AISC (American Institute of Steel Construction) and the RCSC (Research Council on Structural Connections) as an approved installation method.

 





Product Display




JM Hardware® Concrete Screw Bolt 

JM Hardware®  Concrete Bolt

JM Hardware®  Concrete Screw


Quality Control


JM Hardware conducts product quality control in strict accordance with ISO 9001 standards to ensure that our products meet high quality standards. Below are our five quality control steps:

1
1
Incoming material control
We carry out strict incoming material control by conducting dimensional tests on each batch of raw materials and checking the raw material reports from the steel mills. This ensures that the raw materials we use are within specification and provide a reliable basis for production.
1
1
First part control
After the mold assembly is completed, we conduct a thorough inspection of the first production part and make detailed records. Only qualified first parts can be released to start mass production. This step ensures that the quality of the product meets the standard at the beginning.
1
1
Self-inspection by workers during mass production
In the mass production process, we require the workers of each machine to carry out self-inspection every hour. If any substandard product is found, we will immediately pick or scrap the production within this hour until the problem is solved and meets the standard of conformity, and then we can continue the production. This self-inspection mechanism helps to find and solve problems in time during the production process.
1
1
QC inspection during mass production
In addition, every two hours, the quality inspection personnel will carry out random inspection on the products of each machine. Only qualified products can continue to flow into the next production stage. If non-conforming products are found, we will take the same selection or scrapping measures and ensure that the problem is properly handled. This helps provide additional quality assurance.
1
1
Finished product control
Finally, after each batch of finished product is made, we conduct random inspections in proportion to the order. Qualified products will be packaged and put into storage, while unqualified products will be returned for further analysis and rectification. We insist on ensuring that the quality of our products meets high standards so that we can provide reliable products to our customers.
1
1
Non-conforming goods management
According to the process of JMhardware's non-conforming products handling, pick or scrap. And the problem of rectification and tracking reasons to ensure that non-conforming products will not flow into the market.

These quality control measures constitute JM Hardware's quality management system, and we are constantly striving to improve the quality of our products and are committed to meeting the needs of our customers. We believe that quality control is the key to our success.


Production equipment
       
                       
Various punche
                         
Large heat treatment  line
Automatic shamfering machine  


                          
                       
                        



Testing Equipment
       
                       
Universal tensile machine
                       

Rockwell hardness tester

 V hardness tester

Grinding machine, cutting machine 
                       
   
Test report

                

JM Hardware® provides each batch of products with a finished product test report issued by our laboratory. If you need a test report issued by a third party, please inform us separately. The following two templates are for reference


SGS  testing report
Third-party testing report
                              
Packing
   
           


JM small box & JM carton


           


Small bag with lable & Nature carton

      


Small box & Nature carton

   


90 kgs Metal keg & Wood solid pallet

   


Bulk in wood box& Plastic keg +wood solid pallet

   


Fumigation wood pallets & Non fumigation pallets


   
  
   
           


Paper sleeve & Plastic bag + Non fumigation pallets


   
           


Wooden case& Woven bag + Non fumigation pallets

      


Container Packing

   




Why Choose Us

Registered trademarks

RegisterJM in USA,EU ,UK,Quality Assuranc


Strong R&D Capability

Successfully developed 680+ new products in past 16 years

Rich Industry Experience

JM has the rich experience to supply the high quality fasteners to Project contractor

Mature & professional service teams

Provides 24/7 online and offline services for you,70%stuff have 5+ working experience in JM

Rich export experience

15+ years exported to 70+ countries

Supply one-stop service & DDP term

Help clients purchase other products,realize door-to-door service to make international procurement more convenient


Certificate
       
                       
ISO certificate
   
                       
 USA Trade Mark     
                       
EU Trade Mark
     
UK Trade Mark
   
                       
SGS Certificate
   
                       
Alibaba 15 Years Supplier
   
                       
Certificate
   
                       
   Certificate
Valued Partners


JM Hardware @ has exported its hardware parts to over 85 countries around the world.

We will make unremitting efforts to provide hardware parts with high quality and reasonable prices for our customers.

    






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Take advantage of our unrivaled knowledge and experience, we offer you the best customization service.

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They are all manufactured according to the strictest international standards. Our products have received favor from both domestic and foreign markets.
They are now widely exporting to 500 countries.
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