Use this plastic (polyethelene) bulkhead to mount temperature probes from controllers, or some dial thermometers into a thin wall vessel...such as a pot or fermenter.  It will accept any temperature probe or thermometer with  6.5mm diameter

Fits in the end of a RIMS tube.

mount in the lid of a fermenter to house a dial themometer with long probe.

Temperature tolerant to 105C

Note: this is not a thermowell.