One gives things (bottles, screws, even melons in my garden, so they ripen evenly) " quarter turns" or "half turns" -- depending on how much of a turn they should be given.

The LGDT's entry has to do with plumbing, but it's the same thing:

plomberie
robinetterie industrielle


quarter turn (ac)


quart de tour loc adj (abc)
Mouvement de rotation à 90°, de la tige de manoeuvre d'un appareil de robinetterie. (ab)



[Office de la langue française, 1993]
RBT2080152

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