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Konnect Fastening Systems brings you Tension Control Bolts and the innovative Shear Wrench system are the lowest cost method for installing preloaded or High Strength Friction Grip (HSFG) bolts.
TCBs as they are commonly known throughout the world, are replacing conventional high strength friction grip bolts and swaged collar rivets simply because they are quick and easy to install using lightweight electric shear wrenches. Guaranteed tension together with visual inspection removes the likelihood of operator error and ensures engineers that connections are tightened in accordance with specifications.
Our System HRC structural bolting assemblies are used in a wide range of applications, from bridge splice plates to beam-to-column connections, from stadia roof trusses to rail switches and crossings. The combination of a TCBs superior tensile strength and phenomenal ductility result in a truly universal bolt that can be employed in almost all steelwork connections.
Tension Control Bolts Ltd operates a quality management system in accordance with BS EN ISO 9001:2015 and NHSS 3, maintaining full traceability of our products from their initial source of supply through to despatch to the customer.
Quality is at the forefront of everything we do, and we are proud of the outstanding reputation we have created over the last 30 years whilst becoming the market leader in tension control bolting.
To ensure our products conform to all relevant standards and specifications, TCB operate specialist in-house testing equipment including:
Greenkote is an advanced thermal diffusion coating of Zn-Al polymetallic composition. The patented process takes basic thermal diffusion to the next level of quality and durability.
The coating is a technically superior replacement for zinc plating, hot dip galvanizing, mechanical galvanizing and zinc flake dip-spin. Greenkote delivers exceptional protection against corrosion and provides superior adhesion, coating uniformity, is hard wearing and completely eliminates hydrogen embrittlement issues in high strength fasteners.
The Greenkote processes is completely eco-friendly and does not produce any toxics or pollutants, including heavy metals and Cr6+.
Greenkote coatings are applied by a patented Thermo-Chemical Surface Modification (TCSM) batch process which uses a dry bulk powder formulation of zinc, aluminium and other proprietary ingredients that is thermo-diffused into the iron-based metal substrate surface of finished metal parts. The Greenkote coating process forms a protective layer that is physically diffused into the substrate.
Metallurgically bonded, it cannot be easily separated by physical or environmental forces. In addition, the aluminium-rich inclusions dispersed on the surface serve to heal any micro fissures, cracks or porosity in the coating, while the zinc provides a sacrificial barrier against corrosion. The result is a highly uniform, conformal coating that gives exceptional protection against corrosion as well as enhanced durability and other performance advantages. The natural micro-roughness of the Greenkote surface gives it superior adhesion qualities for topcoats or paints.
Greenkote coating along with our unique passivation process provides corrosion protection durability level C5 high when tested in accordance with ISO 12944-6.
Tension control bolts are quick, easy and safe to install. TCB installation is the lowest cost method for properly installing High Strength Friction Grip (HSFG) or Preloaded bolts. For full instructions please download our installation manual.
Installation advantages include:
All of our branches are equipped to supply products straight off the shelf, so whether you are planning for a big project or simply need some last minute supplies to get you through your current project, contact your local Konnect® branch today.
