ASA 4.25 / ANSI 1 Bored Flange, No O-Ring Groove, Not Rotatable, 4.25 in OD, 3.125 in BCD, Four 0.625 in ID Bolt Holes, 304 Stainless Steel. These are ASA 4.25 /ANSI 1 bored flanges, with no O-ring groove, and are not rotatable. These CNC lathe turned ASA/ANSI flanges are bored out for welding to tubing to make vacuum lines. Both sides of the flange are smooth. ASA/ANSI flanges always mate an O-ring grooved flange with a smooth (non-grooved) flange to form a sealed connection with through-hole bolts, nuts, and washers. These flanges are made of 304 stainless steel. Dimensions, in. (mm): A = 4.25 in. (108)B = 3.125 in. (79.4)C = 0.50 in. (12.7)D = 0.625 in (15.8), 4 HolesC = N/AF = 0.92 in. (23.4)G = 1.00 in. (25.7) Other Specifications Made of 304 Stainless Steel Has 4 Bolt Holes Bolt Hole Diameter of 0.625 inches (15.8 mm) Non-Grooved Flange Non-Rotatable Flange Bored Flange ASA/ANSI flanges are available with a smooth or grooved face, rotatable or non-rotatable, bored or non-bored, and are named for the outer diameter of the flange, from 4.25 to 19 inches. The ANSI name for the same flange size corresponds to the nominal tubing size that can be welded to it, and ranges from 1 to 12 inches in diameter. ASA / ANSI flanges were originally used for steam pipes but have now been adapted to vacuum. Diffusion pumps, roots blowers, cryopumps and large rotary piston pumps are some examples of vacuum pumps where these flanges are used. When sealed together with O-rings made of Viton, Buna or Silicone, they are capable of achieving vacuum pressures as low as 1x10-8 Torr. We have a complete line of ASA flanges, O-rings, and bolt sets to fit your most demanding needs.

ASA 1.5 Inch Fixed Bored Flange, No O-Ring Groove, Not Rotatable, 5 in OD, 3.875 in BCD, 0.625 in Hole Diameter, 4 holes, 304 Stainless Steel These are ASA 5.0 /ANSI 1.5 bored flanges, with no O-ring groove, and are not rotatable. These CNC lathe turned ASA/ANSI flanges are bored out for welding to tubing to make vacuum lines. Both sides of the flange are smooth. ASA/ANSI flanges always mate an O-ring grooved flange with a smooth (non-grooved) flange to form a sealed connection with through-hole bolts, nuts, and washers. These flanges are made of 304 stainless steel. Dimensions, in. (mm): A = 5.0 in. (127)B = 3.875 in. (98.4)C = 0.50 in. (12.7)D = 0.625 in (15.8), 4 HolesE = NAF = 1.42 in. (36)G = 1.5 in (38.4) Other Specifications Made of 304 Stainless Steel Has 4 Bolt Holes Bolt Hole Diameter of 0.625 inches (15.8 mm) Non-Grooved Flange Non-Rotatable Flange Bored Flange ASA/ANSI flanges are available with a smooth or grooved face, rotatable or non-rotatable, bored or non-bored, and are named for the outer diameter of the flange, from 4.25 to 19 inches. The ANSI name for the same flange size corresponds to the nominal tubing size that can be welded to it, and ranges from 1 to 12 inches in diameter. ASA / ANSI flanges were originally used for steam pipes but have now been adapted to vacuum. Diffusion pumps, roots blowers, cryopumps and large rotary piston pumps are some examples of vacuum pumps where these flanges are used. When sealed together with O-rings made of Viton, Buna or Silicone, they are capable of achieving vacuum pressures as low as 1x10-8 Torr. We have a complete line of ASA flanges, O-rings, and bolt sets to fit your most demanding needs.

ASA 6.0 / ANSI 2 Bored Flange, No O-Ring Groove, Not Rotatable, 6 in OD, 4.75 in BCD, Four 0.75 in ID Bolts Holes, 304 Stainless Steel. These are ASA 6.0 /ANSI 2 bored flanges, with no O-ring groove, and are not rotatable. These CNC lathe turned ASA/ANSI flanges are bored out for welding to tubing to make vacuum lines. ASA/ANSI flanges always mate an O-ring grooved flange with a smooth (non-grooved) flange to form a sealed connection with through-hole bolts, nuts, and washers. These flanges are made of 304 stainless steel. Dimensions, in. (mm): A = 6.00 in. (152.4)B = 4.75 in. (120.6)C = 0.50 in. (12.7)D = 0.75 in. (19), 4 HolesE = N/AF = 1.91 in. (48.6)G = 2.00 in. (51) Other Specifications Made of 304 Stainless Steel Has 4 Bolt Holes Bolt Hole Diameter of 0.75 inches (19 mm) Non-Grooved Flange Non-Rotatable Flange Bored Flange ASA/ANSI flanges are available with a smooth or grooved face, rotatable or non-rotatable, bored or non-bored, and are named for the outer diameter of the flange, from 4.25 to 19 inches. The ANSI name for the same flange size corresponds to the nominal tubing size that can be welded to it, and ranges from 1 to 12 inches in diameter. ASA / ANSI flanges were originally used for steam pipes but have now been adapted to vacuum. Diffusion pumps, roots blowers, cryopumps and large rotary piston pumps are some examples of vacuum pumps where these flanges are used. When sealed together with O-rings made of Viton, Buna or Silicone, they are capable of achieving vacuum pressures as low as 1x10-8 Torr. We have a complete line of ASA flanges, O-rings, and bolt sets to fit your most demanding needs.

ASA 3 Inch Fixed Bored Flange, No O-Ring Groove, Not Rotatable, 7.5 in OD, 6 in BCD, 0.75 in Hole Diameter, 4 holes, 304 Stainless Steel. These are ASA 7.5 /ANSI 3 bored flanges, with no O-ring groove, and are not rotatable. These CNC lathe turned ASA/ANSI flanges are bored out for welding to tubing to make vacuum lines. Both sides of the flange are smooth. They are welded to tubing to make vacuum lines. ASA/ANSI flanges always mate an O-ring grooved flange with a smooth (non-grooved) flange to form a sealed connection with through-hole bolts, nuts, and washers. These flanges are made of 304 stainless steel. Dimensions, in. (mm): B = 6.00 in. (152.4)C = 0.50 in. (12.7)D = 0.75 in. (19), 4 HolesE = N/AF = 2.87 in. (73)G = 3.00 in (76.8) Other Specifications Made of 304 Stainless Steel Has 4 Bolt Holes Bolt Hole Diameter of 0.75 inches (19 mm) Non-Grooved Flange Non-Rotatable Flange Bored Flange ASA/ANSI flanges are available with a smooth or grooved face, rotatable or non-rotatable, bored or non-bored, and are named for the outer diameter of the flange, from 4.25 to 19 inches. The ANSI name for the same flange size corresponds to the nominal tubing size that can be welded to it, and ranges from 1 to 12 inches in diameter. ASA / ANSI flanges were originally used for steam pipes but have now been adapted to vacuum. Diffusion pumps, roots blowers, cryopumps and large rotary piston pumps are some examples of vacuum pumps where these flanges are used. When sealed together with O-rings made of Viton, Buna or Silicone, they are capable of achieving vacuum pressures as low as 1x10-8 Torr. We have a complete line of ASA flanges, O-rings, and bolt sets to fit your most demanding needs.

ASA 9.0 / ANSI 4 Bored Flange, No O-Ring Groove, Not Rotatable, 9 in OD, 7.5 in BCD, Eight 0.75 in ID Bolts Holes, 304 Stainless Steel. These are ASA 9.0 /ANSI 4 bored flanges, with no O-ring groove, and are not rotatable. These CNC lathe turned ASA/ANSI flanges are bored out for welding to tubing to make vacuum lines. Both sides of the flange are smooth. They are welded to tubing to make vacuum lines. ASA/ANSI flanges always mate an O-ring grooved flange with a smooth (non-grooved) flange to form a sealed connection with through-hole bolts, nuts, and washers. These flanges are made of 304 stainless steel. Dimensions, in. (mm): A = 9.00 in. (228.6)B = 7.5 in. (190.5)C = 0.50 in. (12.7)D = 0.75 in. (19), 8 HolesE = N/AF = 3.87 in. (98.4)G = 4.02 in (102.2) Other Specification Made of 304 Stainless Steel Has 8 Bolt Holes Bolt Hole Diameter of 0.75 inches (19 mm) Non-Grooved Flange Non-Rotatable Flange Bored Flange ASA/ANSI flanges are available with a smooth or grooved face, rotatable or non-rotatable, bored or non-bored, and are named for the outer diameter of the flange, from 4.25 to 19 inches. The ANSI name for the same flange size corresponds to the nominal tubing size that can be welded to it, and ranges from 1 to 12 inches in diameter. ASA / ANSI flanges were originally used for steam pipes but have now been adapted to vacuum. Diffusion pumps, roots blowers, cryopumps and large rotary piston pumps are some examples of vacuum pumps where these flanges are used. When sealed together with O-rings made of Viton, Buna or Silicone, they are capable of achieving vacuum pressures as low as 1x10-8 Torr. We have a complete line of ASA flanges, O-rings, and bolt sets to fit your most demanding needs.

ASA 11.0 / ANSI 6 Bored Flange, No O-Ring Groove, Not Rotatable, 11 in OD, 9.5 in BCD, Eight 0.81 in ID Bolt Holes, 304 Stainless Steel. These are ASA 11.0 /ANSI 6 bored flanges, with no O-ring groove, are not bored, and are not rotatable. These CNC lathe turned ASA/ANSI flanges are bored out for welding to tubing to make vacuum lines. Both sides of the flange are smooth. They are welded to tubing to make vacuum lines. ASA/ANSI flanges always mate an O-ring grooved flange with a smooth (non-grooved) flange to form a sealed connection with through-hole bolts, nuts, and washers. These flanges are made of 304 stainless steel. Dimensions, in. (mm):

ASA 13.50 / ANSI 8 Bored Flange, No O-Ring Groove, Not Rotatable, 13.50 in OD, 11.75 in BCD, Eight 0.81 in ID Bolt Holes, 304 Stainless Steel. These are ASA 13.5 /ANSI 8 bored flanges, with no O-ring groove, and are not rotatable. These CNC lathe turned ASA/ANSI flanges are bored out for welding to tubing to make vacuum lines. Both sides of the flange are smooth. They are welded to tubing to make vacuum lines. ASA/ANSI flanges always mate an O-ring grooved flange with a smooth (non-grooved) flange to form a sealed connection with through-hole bolts, nuts, and washers. These flanges are made of 304 stainless steel. Dimensions, in. (mm): A = 13.5 in. (342.9)B = 11.75 in. (298.5)C = 0.75 in. (19)D = 0.81 in. (20.6), 8 HolesE = N/AF = 7.83 in. (198.9)G = 8.00 in. (203.7)Other Specifications Made of 304 Stainless Steel Has 8 Bolt Holes Bolt Hole Diameter of 0.81 inches (20.6 mm) Non-Grooved Flange Non-Rotatable Flange Non-Bored Flange ASA/ANSI flanges are available with a smooth or grooved face, rotatable or non-rotatable, bored or non-bored, and are named for the outer diameter of the flange, from 4.25 to 19 inches. The ANSI name for the same flange size corresponds to the nominal tubing size that can be welded to it, and ranges from 1 to 12 inches in diameter. ASA / ANSI flanges were originally used for steam pipes but have now been adapted to vacuum. Diffusion pumps, roots blowers, cryopumps and large rotary piston pumps are some examples of vacuum pumps where these flanges are used. When sealed together with O-rings made of Viton, Buna or Silicone, they are capable of achieving vacuum pressures as low as 1x10-8 Torr. We have a complete line of ASA flanges, O-rings, and bolt sets to fit your most demanding needs.

ASA 16.0 / ANSI 10 Bored Flange, No O-Ring Groove, Not Rotatable, 16 in OD, 14.25 in BCD, Twelve 0.81 in ID Bolts Holes, 304 Stainless Steel. These are ASA 16.0 /ANSI 10 bored flanges, with no O-ring groove, and are not rotatable. These CNC lathe turned ASA/ANSI flanges are bored out for welding to tubing to make vacuum lines. Both sides of the flange are smooth. They are welded to tubing to make vacuum lines. ASA/ANSI flanges always mate an O-ring grooved flange with a smooth (non-grooved) flange to form a sealed connection with through-hole bolts, nuts, and washers. These flanges are made of 304 stainless steel. Dimensions, in. (mm): A = 16.00 in. (406.4)B = 14.25 in. (362)C = 1.00 in. (25.4)D = 0.81 in. (20.6), 12 HolesE = N/AF = 9.82 in. (249.5)G = 10.00 in. (254.5)Other Specifications Made of 304 Stainless Steel Has 12 Bolt Holes Bolt Hole Diameter of 0.81 inches (20.6 mm) Non-Grooved Flange Non-Rotatable Flange Bored Flange ASA/ANSI flanges are available with a smooth or grooved face, rotatable or non-rotatable, bored or non-bored, and are named for the outer diameter of the flange, from 4.25 to 19 inches. The ANSI name for the same flange size corresponds to the nominal tubing size that can be welded to it, and ranges from 1 to 12 inches in diameter. ASA / ANSI flanges were originally used for steam pipes but have now been adapted to vacuum. Diffusion pumps, roots blowers, cryopumps and large rotary piston pumps are some examples of vacuum pumps where these flanges are used. When sealed together with O-rings made of Viton, Buna or Silicone, they are capable of achieving vacuum pressures as low as 1x10-8 Torr. We have a complete line of ASA flanges, O-rings, and bolt sets to fit your most demanding needs.

ASA 19.0 / ANSI 12 Blank Flange, No O-Ring Groove, Bored, Not Rotatable, 19 in OD, 17 in BCD, Twelve 1 in ID Bolt Holes, 304 Stainless Steel. These are ASA 19.0 /ANSI 12 bored flanges, with no O-ring groove, and are not rotatable. These CNC lathe turned ASA/ANSI flanges are bored out for welding to tubing to make vacuum lines. Both sides of the flange are smooth. They are welded to tubing to make vacuum lines. ASA/ANSI flanges always mate an O-ring grooved flange with a smooth (non-grooved) flange to form a sealed connection with through-hole bolts, nuts, and washers. These flanges are made of 304 stainless steel. Dimensions, in. (mm): A = 19.00 in. (482.60)B = 17.00 in. (431.8)C = 1.062 in. (27)D = 1.00 in. (25.4)E = N/AF = 11.75 in. (298.5)G = 12.00 in. (305.3)Other Specifications Made of 304 Stainless Steel Has 12 Bolt Holes Bolt Hole Diameter of 1.00 inch (25.4 mm) Non-Grooved Flange Non-Rotatable Flange Bored Flange ASA/ANSI flanges are available with a smooth or grooved face, rotatable or non-rotatable, bored or non-bored, and are named for the outer diameter of the flange, from 4.25 to 19 inches. The ANSI name for the same flange size corresponds to the nominal tubing size that can be welded to it, and ranges from 1 to 12 inches in diameter. ASA / ANSI flanges were originally used for steam pipes but have now been adapted to vacuum. Diffusion pumps, roots blowers, cryopumps and large rotary piston pumps are some examples of vacuum pumps where these flanges are used. When sealed together with O-rings made of Viton, Buna or Silicone, they are capable of achieving vacuum pressures as low as 1x10-8 Torr. We have a complete line of ASA flanges, O-rings, and bolt sets to fit your most demanding needs.

ASA 3 Inch Fixed Bored Flange with no O-Ring Groove, 7.5 in. OD, 6 in. BCD, 4 in. Bore, 0.75 in. Hole dia, 4 holes. This is an ASA 3 inch fixed bored ASA flange with NO O-Ring groove. These flanges are made with weld prep and have tube boring. They are designed to be welded onto tubing. Both sides are smooth with NO O-Ring Groove. They are made of 304 Stainless Steel. See dimensions above in middle graphic. ASA ANSI flanges come in smooth or grooved flanges, bored or non bored, rotatable or non rotatable, and adapters to other flange types. With tubing sizes ranging from 1 in. to 12 in. diameter and outer diameters from 4.25 in. to 16 in. The Sizes of ASA are from 1 in. to 10 in. The two flanges that will mate can be two alike smooth flange faces or two unlike, one smooth face and one groove face. The flanges are mated together with nuts, bolts and washers. (See graphic below) The ASA ANSI flange specification was originally created for use with steam pipes but have now been adapted to vacuum. Diffusion pumps, roots blowers, cryopumps and large rotary piston pumps are some examples of the ASA flange uses. Using O-Rings with Viton, Buna or Silicone they are capable of achieving pressures as low as 1x10-8 Torr. We have a complete line of ASA flanges, adapters, O-rings and bolt kits to fit your most demanding needs. Call us at 505-872-0037 or just find your part by doing a search in the search bar above.