4x screws 7/16-20 UNF x 2 inch to ASME B18.2.1; chromated steel; 2x O-rings to DIN 3771, 20 x 2.65-S-FPM90, max. permissible 420 bar (6092 psi), 120 °C (248 °F). Without cleaning. ********** Please find the L-Price and delivery time on the PVR Home Page: https://sie.ag/2bt4mB **********