Under the effect of a bolt axial load, the Superbolt MJT nut body undergoes a hoop stress thereby causing radial expansion (flexing in at top and out at bottom).

Measuring the expansion with respect to the nut body circumference, however, enables a wider and more accurate response. By controlling the relationship between circumferential expansion and the axial preload, it becomes possible to monitor preload from this unique feature.

• Remote preload monitoring and a live reading of data
• Facilitates more uptime during service
• Precise and repeatable preload reading
• Eliminates the need for modifications of the bolt
• Seamless to retrofit/upgrade — simply replace original nut with the LST
• Robust and reliable, IP67-classed
• Accurate preload verification without adjustment of clamped parts
• No alteration needed of the assembly (including stud or joint design or geometry)
• Removes risk of injuries for operators in hazardous areas
• Eliminates high costs on labor, additional measuring devices, and periodic verification by maintenance