Irwin Hanson 2148 Left Hand Plug Tap 9/16-12 NC HSS

The Irwin Hanson 2148 is a high-speed steel plug tap designed for creating left-hand internal threads in a variety of materials. This tap features 9/16"-12 NC (National Coarse) threading, making it ideal for applications requiring reverse-threaded fasteners that resist loosening under rotational forces.

Key Features:

• Left-hand thread design prevents loosening in counter-clockwise rotating applications
• High-speed steel construction provides excellent wear resistance and durability
• Plug tap style with 3-5 chamfered threads for general-purpose through-hole and blind-hole tapping
• 9/16"-12 NC thread specification follows National Coarse standards
• Precision ground threads ensure accurate, consistent thread formation
• Suitable for use in steel, aluminum, brass, and other machinable materials

This tap is commonly used in automotive, machinery, and industrial applications where left-hand threads are specified to prevent unintended loosening. The plug tap design makes it versatile for both through-holes and blind holes with adequate depth. Recommended for use with appropriate tapping fluid to extend tool life and improve thread quality.