Plaintext # ACME 2G Thread Ring & Plug Gauge – Precision Trapezoidal Thread Checker This high-precision ACME thread gauge set is manufactured to American Standard ANSI/ASME B1.5 specifications, designed for accurate inspection of trapezoidal ACME screw threads. ? High-Quality Material: Made of premium bearing steel with precision heat treatment, offering excellent hardness, wear resistance, and long service life. Thread Type: ACME (Trapezoidal, 29° angle) – Tolerance Class: 2G – Available Sizes: 1/4″-16, 5/16″-14, 3/8″-12, 7/16″-12, 1/2″-10/12, 5/8″-8/10/12, 3/4-6/8/10/12 (select the exact size from the dropdown) – Material: GCR15 steel – Accuracy: Precision machined for industrial-grade measurement Package Includes:1Pair. The product pictures are for display only. The warehouse will send the package according to the title model. There are many models. Gauges should be stored in a dry, clean environment to prevent rust and damage. Calibration is recommended periodically to maintain measurement accuracy.