The Hertel Straight Flute Tap is a precision threading tool designed for creating #4-40 UNC threads with exceptional accuracy. Featuring 3 straight flutes and a plug chamfer, this high-quality tap delivers consistent performance for both through and blind holes. Constructed from premium high-speed steel with a durable titanium nitride finish, it offers extended tool life and improved cutting performance. The tap provides 2B and 3B class of fit, making it suitable for various industrial applications requiring precise threading. With an overall length of 1-7/8" and a thread length of 9/16", this hand tap is perfectly proportioned for controlled tapping operations. The straight flute design efficiently channels chips away from the cutting edge, reducing the risk of clogging and thread damage. This Hertel tap is an essential addition to any machinist's toolbox for creating clean, accurate internal threads.