These stainless steel baseplate fittings with Viton® O-ring adapts from baseplate to CF 2-1/8 inch Del-Seal Conflat Flange NPT-male, Adapts from baseplate fitting to CF 2-1/8 inches CF flange. Baseplate fitting designed to fit through 1 inch diameter ports on baseplates up to 1 inch thick. The flange size follows ISO-CF standards and is CF 2-1/8. This CF-2.12 (2-1/8) inches Del-Seal Conflat Flange fitting is made of 304 Stainless Steel. ConFlat (CF) flanges are used for ultra-high vacuum applications and they use a copper gasket and knife-edge flanges to achieve the high vacuum seal, can operate down to 10-13 torr (10-11 Pa) and can be heated to 450 °C for bake-out. North American flange sizes are given by flange outer diameter in inches: 1-1/3 ("mini conflat"), 2¾, 4½, 6, 8, 10, 12, 13¼, 14 and 16½.

These stainless steel baseplate fittings with Viton® O-ring adapts from baseplate to CF 2-3/4 inch Del-Seal Conflat Flange NPT-male, Adapts from baseplate fitting to CF 2-3/4 inches CF flange. Baseplate fitting designed to fit through 1 inch diameter ports on baseplates up to 1 inch thick. The flange size follows ISO-CF standards and is CF 2.75in, 2-3/4. This CF-2.75 (2-3/4) inches Del-Seal Conflat Flange fitting is made of 304 Stainless Steel. ConFlat (CF) flanges are used for ultra-high vacuum applications and they use a copper gasket and knife-edge flanges to achieve the high vacuum seal, can operate down to 10-13 torr (10-11 Pa) and can be heated to 450 °C for bake-out. North American flange sizes are given by flange outer diameter in inches: 1-1/3 ("mini conflat"), 2¾, 4½, 6, 8, 10, 12, 13¼, 14 and 16½.