A bolt that loses its clamping force is next to useless, and many of today’s common methods for securing bolts fall in that same category, according to the engineers at Nord-Lock Inc., Muskegon, Mich.

A piezoelectric load-sensing washer currently under development provides a more accurate way to measure the clamping force exerted by the bolt it is on. A piezoelectric load-sensing washer being ...

Workers often tighten bolts to 75% to 80% of the bolt proof load. This works for many joints, but in some cases, external tensile loads reduce bolt clamping forces to zero. Something other than the 75 ...

Composite materials are replacing metals in a variety of engine and transmission components, including covers, manifolds, pumps and housings. In many applications, the cost and complexity of mounting ...

Torque-to-yield (TTY) bolts, also known as angle torque or stretch bolts, are fasteners designed to be tightened beyond their elastic range and into a controlled yield zone. Their job is to apply a ...

Many don't give a second thought to cylinder head bolts once they're taken out of an engine, thinking of them as just another set of fasteners. But they have a much bigger role, maintaining a ...