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Through hole

Through-Hole Tensioner Features & Options

Hydraulic tensioning is the ideal method for tightening bolted connections. Hydraulic tensioning eliminates inaccuracies and helps achieve correct bolt loading in critical connections. At HTI, we’ve been building hydraulic tensioners and nuts since 1986.

Through-hole tensioners (also called hollow-piston or hollow-plunger) are intended for use with long protruding studs, such as for wind turbine foundation bolts, or with a proprietary rolled threaded rod. Rather than the puller screwing onto the stud, as with a normal tensioner design, a through-hole tensioner uses a standard stud bolt threaded onto the protruding threads on top of the puller as the reaction nut, to transfer the load from the tensioner to the stud.

HTI can make any tensioner a through-hole tensioner. 

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Through-hole foundation stud tensioner

Through-hole foundation stud tensioner

Custom Engineered Tensioners Since 1986

HTI has been designing engineered solutions to your toughest bolt tensioning problems since 1986! You can choose from one of our standard catalog sizes above, or we can design a custom fixed tensioner for any application when a standard model won’t work. HTI tensioners can be designed for imperial or metric-sized studs, high loads, high temperatures, large stud sizes, or corrosive environments. Our multi-unit tensioning systems can make easy work of large bolted systems, and our automated tensioning systems can reduce labor and increase throughput in high-volume manufacturing applications. 

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If you have questions, comments, would like more information about our products, or want to get started designing your custom tensioning solution, please contact us and we will respond promptly.