Self-grounding, normally Off. Heavy duty, corrosion-resistant. Switches utilize PTF or NPTF dryseal thread which requires no sealant. Switches close a ground circuit to indicator lights or other warning devices that warn of a ‘hot’ or ‘cold’ condition. Cannot be used with gages. .250" blade (6.4mm) terminal except where noted. For use with indicator light or buzzer. 1/2" -14 dryseal thread mounting stem (PTF-SAE short). Mounting hex flat 15/16". (84.4 – 102.2°C).