Truthread Plug Thread Gauge (D/E) - UNF - Right Hand - 2B - No. 6x40

The Truthread Plug Gauge (D/E) - UNF - Right Hand - 2B - No. 6x40 is a compact, precision tool designed to verify the internal threads inside holes. It is built to cover common Unified thread standards—UNC, UNF, and UNEF—making it ideal for machinists, quality inspectors, engineers, and hobbyists who need fast, reliable thread checks. Use it to confirm that drilled or threaded holes mate correctly with fasteners and to support consistent part quality across production runs.

A tapered probing end paired with an ergonomic handle lets you insert the gauge smoothly into threaded holes, delivering quick, trustworthy readings with minimal chance of cross-threading or damage. The No. 6x40 designation and 2B tolerance provide a precise, repeatable measurement reference that fits neatly into tool carts, inspection benches, and calibration workflows.

• Universal UNC/UNF/UNEF compatibility: Calibrated to the major UN thread forms, so you can confidently check a wide range of holes without switching gauges.
• Tapered probe with ergonomic handle: Easy, safe insertion into threads, speeding up setup and reducing the risk of thread damage during measurement.
• Precise 2B tolerance for repeatable results: Tight tolerances ensure consistent readings from hole to hole, supporting reliable quality control and fewer reworks.

Used in manufacturing, assembly, and maintenance environments, this plug gauge helps you verify thread integrity quickly, streamline inspections, and maintain high standards of fit and performance across parts and assemblies.