I used it for short cable of PC power supply. I made it possible to clarify the inside of a narrow PC case and to make it clearer by further shortening useless cable length to the best length. Since Molex genuine products, accuracy is perfect, of course.
It's safe because it's a classic Molex classic. However, it is difficult to understand how to order ↓ ↓ as you say. Since the receptacle and the housing are always used as a set, please be sure to put them on the same product page as well.