Nut style Multi-Jackbolt Tensioners from Superbolt are an innovative bolting product that will eliminate expensive and dangerous tooling. Only hand/air tools are required for installation and removal of any size tensioner.
Below are the available series. These are simply guidelines to choose the appropriate product for your application. When you contact us for a quote or to order, we will verify that the correct product is being purchased for your application.
![]() |
Medium Temperature: -50ºF to 650ºF
High Temperature: |
Standard Series: • MT - Standard Tensioners |
Operating Temp: -50ºF to 500ºF
Description: Patented SX8 series Flexnuts are designed to flex within the bolt stress range common for most torquebolts. They are ideal for reducing stress concentrations and also for adding flexibility to gasketed joints. They are suitable for SB8, SB12, and SSJX Torquebolts, and also in conjunction with through studs and Torquenuts.
Application Examples: Test equipment, aircraft equipment, rocket and space, nuclear, mining, crushers, gasketed flanges, etc.