10-15-2024, 05:10 AM
per google:
Bolts that stretch under use are called torque-to-yield (TTY) fasteners or stretch bolts. They are tightened past their elastic limit, causing them to permanently deform and elongate. TTY bolts should never be reused because they become weakened and can't apply the proper clamp load. They must also be replaced if they are loosened or removed, even slightly.
Stretch bolts are designed to stretch when assembled to provide a strong and reliable clamp. They are especially useful in critical assemblies where loose bolts can cause serious problems
Bolts that stretch under use are called torque-to-yield (TTY) fasteners or stretch bolts. They are tightened past their elastic limit, causing them to permanently deform and elongate. TTY bolts should never be reused because they become weakened and can't apply the proper clamp load. They must also be replaced if they are loosened or removed, even slightly.
Stretch bolts are designed to stretch when assembled to provide a strong and reliable clamp. They are especially useful in critical assemblies where loose bolts can cause serious problems