Convenient combo pack includes a 4-40 National Coarse plug tap and matching #43 wire gauge drill bit for creating threaded holes in one purchase.

• High carbon steel plug tap - heat treated and tempered for file-hard threads
• HSS (high speed steel) drill bit with 135-degree split point
• Plug-style tap with 3-5 threads chamfered for easy starting
• Straight flute design for hand tapping in aluminum, mild steel, cast iron, wood, and plastic
• 4-40 NC (National Coarse) thread - common for small machine screws and electronics
• Use with a T-handle tap wrench for best results