Johnson Gage JG-750-10-UNC-3A Thread Plug Gage is a setting plug gauge designed to inspect internal threads of 0.750-10 UNC, class 3A. It specifies a mean pitch diameter of 0.6828 inches, providing a precise reference for thread acceptance. Used in quality control and setup in precision machining, this gauge helps verify that threaded holes conform to the exact 0.750-10 UNC-3A specification before fastener assembly.
