The TNA® Torque+Angle Fastening System was utilized throughout the build of NASA’s new Mobile Launcher 2. The ML2 ground platform structure will launch spaceships to the Moon and Mars as part of NASA’s Artemis program.
The TNA® Torque+Angle Fastening System is redefining standards in fastener reliability and assembly consistency. Developed by LeJeune Bolt Company, a name synonymous with quality fastening solutions, this system delivers an advanced, data-driven method for applying the perfect clamp load in critical joints.
Unlike traditional torque-only methods, which are susceptible to variations in friction and material properties, the TNA® Torque+Angle Fastening System combines both torque and angle measurements to ensure optimal bolt stretch and clamping force. By monitoring the angle of rotation after a predetermined snug torque is reached, the system guarantees that each bolt is tensioned to the correct specification—regardless of thread condition or lubrication inconsistencies.
LeJeune’s proprietary TAE Series tools are exclusively designed for the TNA® Torque+Angle Fastening System. Through the use of Torque for the snug operation and Angle for the Pre-Tensioning operation the TAE tools provide unmatched control and accuracy. This is the simplest and most accurate means to perform the RCSC Approved Combined Method of installation.
TNA® is the only fastening system that delivers both a quantifiable Snug Tight condition—ensuring every bolt in a connection meets a minimum requirements for tension—and the precise required angle for the perfect final pretension. In addition, the TNA® Bolts meet the requirements of ASTM F3148 and are 100% Melt & Manufacture in the U.S.
Whether you’re assembling a suspension bridge or a gas turbine, the TNA® Torque+Angle Fastening System from LeJeune Bolt Company ensures each connection is as solid as the reputation behind it. It’s not just about turning bolts—it’s about turning precision into progress.
