Bolting System

Fasteners with a tapered shaft (tapping screws)
“Screw” - There is not a universally accepted definition of the word, “screw”. It generally refers to a smaller threaded fastener with a tapered shaft.
Wood Screw – Generally has an un-threaded portion of the shaft below the head. It is designed to attach two pieces of wood together.
Lag Screw […]

Here are some other types of threaded fasteners
Thread rolling screws - have a lobed (usually triangular) cross section. They form threads by pushing outward during installation. They may have tapping threads or machine threads.
Superbolt, or Multi-Jackbolt Tensioner Alternative type of fastener that retrofits or replaces existing nuts, bolts, or studs. Tension in the bolt is […]