Van Keuren Metric Thread Plug Gages GO/NOGO Van Keuren's Thread Gages allow you to inspect the pitch diameter and the functional thread for internal threaded products. All stock Metric Thread Plug Gages are made to Class X tolerances per ASME B1.16M (Metric M Series Screw Threads). A Certificate of Accuracy is included with each gage. Available in 6H, and each Thread Plug Gage is marked with nominal size, threads per inch, class of fit and pitch diameters. Features include... M3.0x.50 Threads GO and NO GO Set Certificate of Accuracy included Select Taperlock, Reversible, or Set Plug from Pull Down Menu. Taperlock Plug 6H... GO Gage Length: 5.6mm NO GO Gage Length: 4.0mm GO Pitch Diameter: 2.675mm NO GO Pitch Diameter: 2.775mm Reversible Plug 6H... GO Gage Length: 20.6mm NO GO Gage Length: 20.6mm GO Pitch Diameter: 2.675mm NO GO Pitch Diameter: 2.775mm Set Plug 6g... GO Gage Length: 9.5mm NO GO Gage Length: 9.5mm GO Pitch Diameter: 2.655mm NO GO Pitch Diameter: 2.580mm