3-3/8"

Manufactured for use in vacuum piping systems, CF flanges use a mechanical seal to create a leak-tight connection between flanges. When the bolts squeeze the flanges together, the soft metal gasket melds into a thin groove cut into the flat flange surface which provides the leak-tight seal. Flanges operate in temperature from -196°C through 450°C and pressures from 760 Torr (103mbar) to less than 1 x 10-12 Torr (1 x 10-12 mbar). Available in fixed or rotatable designs. A fixed design is a one piece bolt-hole pattern. The rotatable design consists of a weld ring and bolt ring, which rotates to mate with the other flange for easier installation.

Fixed

SKU OD - A Thru Hole - B C D Setback - E F Bolt Hole Diam/Thrd Bolt Holes Bolt Hole Style Price
1795 3.37 1.875 2.01 0.625 0.225 2.85 5/16-24 8 Tapped $42.00 Add to cart
1794 3.37 1.375 1.51 0.625 0.225 2.85 5/16-24 8 Tapped $42.00 Add to cart
1793 3.37 0.625 2.85 5/16-24 8 Tapped $42.00 Add to cart
1792 3.37 1.875 2.01 0.625 0.225 2.85 0.332 8 Clearance $38.00 Add to cart
1791 3.37 1.375 1.51 0.625 0.225 2.85 0.332 8 Clearance $38.00 Add to cart
1790 3.37 - - 0.625 - 2.85 0.332 8 Clearance $38.00 Add to cart

Rotatable

SKU OD - A Thru Hole - B C D Setback - E F Bolt Hole Diam/Thrd Bolt Holes Bolt Hole Style Price
1891 3.37 1.875 2.01 0.625 0.225 2.85 5/16-24 8 Tapped $53.00 Add to cart
1889 3.37 1.375 1.51 0.625 0.225 2.85 5/16-24 8 Tapped $53.00 Add to cart
1888 3.37 0.625 2.85 5/16-24 8 Tapped $53.00 Add to cart
1887 3.37 1.875 2.01 0.625 0.225 2.85 0.332 8 Clearance $42.00 Add to cart
1884 3.37 1.375 1.51 0.625 0.225 2.85 0.332 8 Clearance $42.00 Add to cart
1883 3.37 - - 0.625 - 2.85 0.332 8 Clearance $42.00 Add to cart