The man eyed the tall door and noticed the bolt heads for the hinges on one side.

He directed Ned along it until they came to a heavy door which was studded with bolt heads.

For the bolt head was turned upward, in a notch on the other side of the door.

The first effect was to draw the bolt head downward, for it could not move horizontally.

The bolt head is inset and covered with a plug.

His hand holding the bolt head has a gold wedding band.

For thick bolts, it may be easier to first split the bolt head.

Anyway, he claims his assistants examined that ship down to the bolt heads.

You then fit a special bar onto the bolt head pull down, and it rips out the whole of the cylinder.

Now the thing was together, right down to the last turn of the torque wrench on the final bolt head.