Plug tap designed for internal threads in open or through holes. HSS-E substrate provides durability and wear resistance for repeated tapping. Steam-oxide finish helps prevent welding to the workpiece, reducing friction and extending tool life. Key benefits - Flexible hole compatibility: threads suitable for both open and through holes, enabling versatile use in different components. - Durable construction: HSS-E substrate delivers high hardness and wear resistance for longer life when tapping tougher materials. - Anti-weld coating: steam-oxide finish minimizes sticking and welding to the workpiece, improving starting action and cutting reliability. Applications - Tapping internal threads in through holes on metal plates, panels, or frames during assembly. - Restoring or creating threads in through-hole sections of cast iron or steel components. - Finishing internal threads in machine housings or other metal components that incorporate through holes for fasteners.