RIFE Sensors Surface Mount Temperature Sensors
Temperature Range -20 to 275°F
Bolt-Down or Sub-surface mounting
Bolt-Down Style for 1/4”, 5/16” or 3/8” diameter
Bolt-Down Style comes with Insulating Washer
Sub-Surface Style mounts in 3/32” hole with Epoxy, Silicone or 400°F adhesive disc (included)
https://rifesensors.com/wp-content/uploads/2020/05/Rife-Surface-Mount-Temp-Sensor-Instructions-updated-5-15-20.pdf