title: Hydraulic fluid power - One-piece square-flange connections — Part 3: Four-screw square-flange connections, 50 MPa (500 bar) series, DN 12 to DN 50
title: Transmissions hydrauliques - Brides de raccordement carrées monobloc — Partie 3: Brides de raccordement carrées à quatre vis, série 50 MPa (500 bar), DN 12 à DN 50