Correct option is C
A roughing out machine tap, also known as a gun tap or forming tap, is a special type of tap used for high-speed thread forming instead of thread cutting. Unlike conventional cutting taps, a roughing tap does not have flutes because it does not remove material by cutting. Instead, it displaces the material to form the threads through plastic deformation.
· No chip formation since it works by plastic deformation.
· Stronger than cutting taps because there are no flutes, which means more material is available to withstand high loads.
· Used for high-strength materials like stainless steel and aluminum alloys.
