Explore Different Types of Fasteners

What type of fastener is commonly used in wood applications and has a bulge-shaped head?

A) Drywall screw
B) Drive screw
C) Thread-forming screw
D) Lag screw

Answer:

The type of fastener with a bulge-shaped head is a lag screw.

A type of fastener with a bulge-shaped head is a lag screw. This is a heavy-duty fastener commonly used in wood applications. The head of a lag screw, different from drywall screws, drive screws, and thread-forming screws, is typically larger and has a more pronounced bulge shape. It's designed to be driven with a wrench or a socket and it provides a robust connection.

The drywall screw, another type of fastener, is used specifically for attaching drywall to wood or metal studs. It has a bugle head which helps the screw to stay in place without ripping through the drywall. The drive screw and thread-forming screw also have their specific uses. Drive screw has a somewhat rounded or flat head and is driven into place with a hammer or mallet. The thread-forming screw, on the other hand, is meant to be used in metal applications. It has a highly defined thread and a sharp point for drilling into metal.