Which wood fastener creates a threaded connection on the opposite side of a hole?

Which wood fastener creates a threaded connection on the opposite side of a hole?

• A. Knock down fittings
• B. Modesty blocks
• C. Cam lock connector
• D. Barrel nut and bolts

Answer: (D)

Barrel nut and bolts demonstrate how to create a threaded joint through a hole from the far side. A barrel-shaped nut sits in a drilled hole in one wood piece, while a bolt passes through the adjoining piece and threads into that nut. This gives a strong, concealed threaded connection on the opposite side of the hole, which is exactly what the question describes. Other options involve different joining methods—cam locks use a rotating cam to lock pieces without a threaded joint, while knock-down fittings cover a range of hardware and modesty blocks aren’t designed to provide a threaded through-joint.

Barrel nut and bolts demonstrate how to create a threaded joint through a hole from the far side. A barrel-shaped nut sits in a drilled hole in one wood piece, while a bolt passes through the adjoining piece and threads into that nut. This gives a strong, concealed threaded connection on the opposite side of the hole, which is exactly what the question describes. Other options involve different joining methods—cam locks use a rotating cam to lock pieces without a threaded joint, while knock-down fittings cover a range of hardware and modesty blocks aren’t designed to provide a threaded through-joint.