Irwin Hanson 1112 4-40 NC Machine Plug Tap

The Irwin Hanson 1112 is a high-quality machine screw plug tap designed for creating 4-40 NC (National Coarse) threads. This versatile threading tool is built for both hand and machine tapping applications in a variety of materials.

Key Features:

• 4-40 NC thread specification for standard national coarse threading
• Plug tap design with chamfer starting taper for general-purpose use
• Straight flute construction provides rapid chip removal and efficient threading performance
• Produces Class 2B internal threads for standard tolerance applications
• Ideal for routine maintenance, repair work, and rethreading operations
• Suitable for hand threading work in metal, plastic, and composite materials

This tap is an excellent choice for maintenance professionals, mechanics, and machinists who need reliable threading tools for everyday repair and fabrication tasks where high-precision tolerances are not critical. The straight flute design ensures smooth chip evacuation, reducing tap breakage and extending tool life.