Which fastener type is described as having pointed heads and sharp fine threads?

Which fastener type is described as having pointed heads and sharp fine threads?

• A. Sheet metal screws
• B. Machine screws
• C. Wood screws
• D. Lag bolts

Answer: (A)

The features described—a pointed tip and sharp, fine threads—signal a fastener designed to work with metal. This type is sheet metal screws. The pointed tip helps the screw bite into metal and start threading as you drive it, and the fine threads provide good grip in thin metal without needing a pre-drilled hole. They’re often self-tapping, meaning they create their own threads as they go. Other fasteners don't fit this description as well: machine screws have fine threads but usually require a pre-tapped hole or nut and don’t rely on a pointed tip to start in metal; wood screws have coarser threads and a less pointed tip tailored for wood fibers; lag bolts are large, coarse-threaded, heavy-duty wood fasteners with hex heads.

The features described—a pointed tip and sharp, fine threads—signal a fastener designed to work with metal. This type is sheet metal screws. The pointed tip helps the screw bite into metal and start threading as you drive it, and the fine threads provide good grip in thin metal without needing a pre-drilled hole. They’re often self-tapping, meaning they create their own threads as they go.

Other fasteners don't fit this description as well: machine screws have fine threads but usually require a pre-tapped hole or nut and don’t rely on a pointed tip to start in metal; wood screws have coarser threads and a less pointed tip tailored for wood fibers; lag bolts are large, coarse-threaded, heavy-duty wood fasteners with hex heads.