Tension Control Bolts - TC Bolts - Twist Off Bolts | AFT Fasteners

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Tension Control Bolts

Tension control bolts, TC Bolts or “Twist-Off” bolts, have become one of the world’s most widely used method to tension high strength structural bolts, as they can be used in almost all steelwork connections. As a high strength tension control bolt distributor, AFT offers ASTM A325 and A490 TC bolts in bolt sizes ranging from 5/8” up to 1” and lengths from 1-1/2” up to 7”. The finishes include plain and galvanized for additional corrosion protection.

Tension Control Bolt Fastening System

The tension control bolt consists 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. 

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Tension Control Bolts in Bulk

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