I need to order some stud bolts for the construction project.

The shackle bolts on the bridge were rusted and needed to be replaced.

The mechanic tightened the throat-bolts on the engine.

I need to tighten the drag bolts on the machine.

I found a bag of elf bolts in the attic.

The lightning bolts illuminated the night sky.

I saw several wrain-bolts in the sky during the storm.

I need to buy some hex head bolts for my project.

The news of their engagement came as bolts from the blue.

Bolts out of the blue are unexpected events that catch us off guard.