Tension Control Bolts (TC Bolts)

Transform your steelwork connections with Tension Control Bolts, also known as TC Bolts or Twist Off Bolts. These bolts have emerged as a global frontrunner in tensioning high-strength structural bolts, finding extensive application in diverse steelwork projects. As a premier distributor of high-strength tension control bolts, AFT proudly presents a comprehensive range, featuring ASTM A325 and A490 TC bolts.

Available in a spectrum of bolt sizes ranging from 5/8” up to 1” and lengths spanning 1-1/2” to 7”, our TC bolts cater to a wide array of construction requirements. Whether you're working on bridges, buildings, or other critical structures, these bolts provide unparalleled reliability and versatility in tensioning applications.

AFT ensures that our tension control bolts meet the highest standards of durability and corrosion resistance. Choose from our selection of finishes, including plain and galvanized, providing an extra layer of protection against corrosion. Elevate your construction projects with the strength and precision of AFT's tension control bolts – the cornerstone of secure and enduring steel connections.

Please contract us today with any questions on TC bolts or to request a quote on large quantities. We're here to help!

TC Bolts Fastening System

TC bolts consist of a three-piece fastening system with 1) a round head bolt with a truncated, flat surface area at the top of the bolt, and a 24-sided tip which protrudes from the opposite end. The tip is calibrated to shear off when the proper tension is applied. 2) a heavy hex nut and, 3) a structural flat washer. 

Tension Control Bolts in Bulk


Tension Control Bolt Resources: