Thread Converters - Enlargers, Reducers and ConvertersStandard Ex d Stopping Plug - Metric Thread - Standard Ex d Stopping PlugStandard Ex d Stopping Plug - NPT Thread Standard Ex d Stopping PlugTamperproof Ex d Stopping Plug - Metric Thread - Tamperproof Ex d Stopping PlugTamperproof Ex d Stopping Plug - NPT Thread - Tamperproof Ex d Stopping PlugHex Head Ex e Stopping Plug - Metric Thread - Hex Head Ex e Stopping PlugDome Head Ex e Stopping Plug - Metric Thread - Dome Head Ex e Stopping PlugEx e Nylon Stopping Plug - Metric Thread - Nylon Stopping Plug