English to French Tech/Engineering Mechanics / Mech Engineering

Bonjour,

Je cherche la traduction de "base ring key".
Contexte : "A base ring key, secured with a base ring key screw, is typically located in the outer turn of the base rings to prevent subassembly rotation. A dowel, pressed into the base ring outer diameter or bottom face, may also be used as an anti-rotation device."

Le contexte est celui d'une notice d'utilisation d'une butée (thrust bearing).

Merci de votre aide !