Truthread Thread Ring Gauge (NoGo) - UN - Right Hand - 2A - 1.3/8x20 Kits The stub length and straight

The stub length and straight shank improve rigidity in constrained setups

achieve consistent surface quality

Steam-tempered Black Oxide Finish: Harder surface with improved corrosion resistance that reduces friction and heat buildup during drilling

and durable MT7 TiN‑coated inserts supports efficient production workflows

built for precision in mold and die applications

Truthread Thread Ring Gauge (NoGo) - UN - Right Hand - 2A - 1.3/8x20 Kits The stub length and straightThe Truthread Thread Ring Gauge (NoGo) is a precision inspection tool designed specifically for UN threads. Calibrated to exact tolerances, it helps inspectors, machinists, and quality teams verify that threaded parts stay within spec with confidence and speed. UN Thread Specific Calibration: Engineered and calibrated for UN threads, delivering reliable size checks for the 1 3 8 x 20, right hand, 2A class to support consistent quality across