Yimpompo esetyenziselwa ukucubungula kunye nokufakela imisonto yangaphakathi yofakelo lwe-Screw, eyaziwa ngokuba yi-ST taps kunye ne-screw tap.Yahlulahlulwe yaba ziimpompo zegroove ezithe tye, iitephu ze spiral groove kunye neetephu ze-extrusion ngokwemilo kunye nendlela yokwenza imisonto.