A hole drilled as a guide for inserting a nail or screw is known as which?

A hole drilled as a guide for inserting a nail or screw is known as which?

• A. Pilot hole
• B. Clearance hole
• C. Countersunk hole
• D. Datum hole

Answer: (A)

A guiding hole is drilled to steer the fastener as you drive it, helping it go in straight and reducing the chance of splitting the wood. This is called a pilot hole: it’s small enough to let the screw’s threads bite into the material while guiding the screw along the intended path. A clearance hole, by contrast, is larger so the screw can pass through without gripping the surrounding piece, which isn’t about guiding the fastener. A countersunk hole is shaped to sit the screw head flush with the surface. A datum hole is a reference hole used for alignment or measurement.

A guiding hole is drilled to steer the fastener as you drive it, helping it go in straight and reducing the chance of splitting the wood. This is called a pilot hole: it’s small enough to let the screw’s threads bite into the material while guiding the screw along the intended path.

A clearance hole, by contrast, is larger so the screw can pass through without gripping the surrounding piece, which isn’t about guiding the fastener. A countersunk hole is shaped to sit the screw head flush with the surface. A datum hole is a reference hole used for alignment or measurement.