Component Material designation1 Cutting rings with O-Ring (standard) 1.4571 Carbon steel VOSS Fluid n.a. FKM Fittings 1.4571 Carbon steel with VOSS coat corrosion protection ISO [...] approval certificate includes coupling types as specified in the VOSS catalogue “Hydraulic connection technology, Section 3 – Cutting rings, DIN union nuts”. In addition, the following couplings and [...] Scope Example Fitting body Manufacturer sign, suppliers mark VOSS, 1K Cutting ring VOSS, 33 O-Ring Color, FKM Black Nut Size, suppliers mark M24, 86 Job Id: 262.1-002866-4 Certificate No: TAP0000167