To properly use thread ring gages: 1. Select the correct size gages that match the part's specifications for diameter, pitch, class of fit, and any special diameters. 2. Confirm the gages meet the proper standards, such as ISO, ANSI, or JIS depending on the application. 3. Verify pitch diameters match the part's specifications, such as pre-plating dimensions. 4. Ensure gages are calibrated and recheck them prior to use with a matching plug gage.