Also known as cold-forming and fluteless taps, these press threads into material without cutting it, so no chips are created. They produce stronger threads than other taps, but more torque is required to drive them into the workpiece. With no need to reverse while tapping, these taps create threads more efficiently than standard taps and are often used for production work.

Use uncoated taps for short production runs. Titanium-nitride (TiN) coated taps resist heat and wear better than uncoated taps, so they'll last longer when threading similar material.

Plug-chamfer taps are a versatile choice for most tapping applications. They have 3-5 chamfered threads to press threads into the workpiece, so they're good for start-to-finish tapping.

Bottoming-chamfer taps form threads in the workpiece with just 1-2 chamfered threads. This short chamfer lets them thread holes closer to the bottom than other taps, but they require more torque to start threads.

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