Besly 2-1/2-8 NS GH 4-Flute Plug Tap is a plug-style internal-thread cutting tool, sized 2-1/2-8 with NS and GH designations and configured as a 4-flute plug tap. Plug taps are designed to cut internal threads in holes, and the fluted portion provides space for chips and coolant to flow, with 2-, 3-, or 4-flute configurations being common. Besly's catalog uses codes like NS and GH to denote specific series and flute arrangements, a naming convention echoed in Besly's tapping catalog. This combination of size, flute count, and branding makes it suitable for machining large-diameter holes where clean threading and reliable chip evacuation are critical.
