This is a "wet" temperature sensor for a Boilermate 2000 thermal store. The pin connectors are inserted into a plastic plug that connects to the control board (see 2nd image).
The pins do not stick out from the plug (see 3rd image which shows that the main pins are on the PCB).
Are the pin connectors some sort of standard part? If so, what are they called?
Best Answer
Those are called Bootlace Ferrules and, yes, they're pretty standard in electrical wiring. They come in many different sizes, and each size has its own colour.
There are also Twin Entry options, that allow two wires to be joined: