Irwin 80230 Hanson 1/4"-20 NC Thread HCS Plug Tap and 13/64" HSS Drill Bit Combo Pack
• 1/4"-20NC Tap size / # 7 Drill Bit
• Designed for hand threading work in a variety of materials
• Tap size and drill bit size are etched on each tool for easy identification
• First 3 to 5 threads chamfered for general purpose threading
• Straight flutes are ground to provide rapid chip removal for efficient threading
High carbon steel plug tap is included to simplify hand tapping, high speed steel drill is included to ensure fast clean drilling, the exact size drill is packaged with the tap to produce a thread with the most desirable qualities of strength and ease of tapping.