Description: 3\/8-18 UNS HSS Thread Tap Hand Tap With Round Die High Speed Steel Tapping Hand Tool   Specifications: Model: 3\/8-18 UNS Material: HSS Hand Tap size: 80x9mm Die size: 30x11mm (D*T) Application: The cutting tool for machining the external thread is composed of a cutting part、 a positioning part and a discharging hole.   How to use: -When tapping、 insert the head to tap the center line and the center line of drilling. -Both uniform rotation and slightly pressure to tap、 after don't add pressure. -Each turn tap a reversal of about 45  to cut chip、 so as to avoid blocking. -If the increase in rotational force can not rotate or tap when tapping difficulty、 or it will break.     Package Included: 1 x Hand Tap 1 x Round Die   More  Details: