Tension Control Bolts
Tension Control Bolts Ltd supplies high strength TCBs and shear wrenches for structural steel connections.
Last updated September 1, 2026
Overview
Tension Control Bolts Ltd has been operating for some fifty years, originally involved in the manufacture of standard bolting. The company pioneered the Greenkote® coating system, which revolutionised the coating of threaded fasteners and guaranteed the complete absence of hydrogen embrittlement in high strength bolts. TCBs are used in steel bridges, high rise building structures, stadia, and wind turbines.
History
Tension Control Bolts Ltd has been operating for some fifty years, originally involved in the manufacture of standard bolting. TCBs were a British concept but found popularity first in the Far East and then the USA. The bolt has now established a firm foothold in the construction industry throughout Europe and has virtually replaced the original standard high strength friction grip bolts and nuts. When Tension Control Bolts Ltd pioneered the Greenkote® coating system, it was probably the most significant moment in the company's history. Greenkote, with its natural advantages, instantly revolutionised the coating of threaded fasteners and guaranteed the complete absence of any form of Hydrogen embrittlement in high strength bolts.
Sources
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