1. Application: This plug and socket test gauge is mainly used to test and inspect whether the structure and size of plugs and sockets conform to UL 498:2017 standards. And the mainly application industries is electronics, electrical appliances, plugs and sockets and other similar areas.

2. Features: Gauge dimensions, tolerances, material, hardness, surface roughness conform to the standards requirements; Material hardness is more than 50HRC;Material thermal expansion coefficient is small,dimensions and tolerances is stable and reliable.