Irwin Hanson #4-40 NC Plug Tap

The Irwin Hanson #4-40 NC Plug Tap is precision engineered for general-purpose hand threading, routine maintenance, and rethreading applications. Featuring straight flutes ground to ensure rapid chip removal, this tap delivers efficient, clean threading performance across a wide variety of materials. It produces standard Class 2B threads suitable for general maintenance and repair operations. Crafted from durable high carbon steel, this plug tap is designed with 3 to 5 chamfered threads to facilitate smooth starting and accurate alignment. Ideal for shop and field work, it provides dependable cutting performance for professional tradespeople and repair technicians.