This product is not recommended for new designs 3/8" -18 dryseal thread mounting stem (NPTF). Mounting hex flat 13/16". (87.8 – 98.9°C). Self-grounding, normally Off. Heavy duty, corrosion-resistant. Utilizes NPTF dryseal thread which requires no sealant. Cannot be used with gages. .250" blade (6.4mm) terminal. For use with indicator light or buzzer.