Compare Model Drawings, CAD & Specs Flange Size Inner Diameter Thickness Availability Price
Buna-N O-Ring, NW63 Size ISO-MF Vacuum Flange, 2-336 O-Ring Size
$1.70
7 Weeks
NW63 2.85 in. (72 mm) 0.21 in. (5 mm)
7 Weeks
Buna-N O-Ring, NW80 Size ISO-MF Vacuum Flange, 2-340 O-Ring Size
$2.70
7 Weeks
NW80 3.35 in. (85 mm) 0.21 in. (5 mm)
7 Weeks
Buna-N O-Ring, NW100 Size ISO-MF Vacuum Flange, 2-346 O-Ring Size
$2.70
7 Weeks
NW100 4.10 in. (104 mm) 0.21 in. (5 mm)
7 Weeks
Buna-N O-Ring, NW160 Size ISO-MF Vacuum Flange, 2-361 O-Ring Size
$3.40
7 Weeks
NW160 5.98 in. (152 mm) 0.21 in. (5 mm)
7 Weeks
Buna-N O-Ring, NW200 Size ISO-MF Vacuum Flange, 2-371 O-Ring Size
$6.20
NW200 8.48 in. (215 mm) 0.21 in. (5 mm)
Buna-N O-Ring, NW250 Size ISO-MF Vacuum Flange, 2-378 O-Ring Size
$7.60
7 Weeks
NW250 10.48 in. (266 mm) 0.21 in. (5 mm)
7 Weeks
Buna-N O-Ring, NW320 Size ISO-MF Vacuum Flange, 2-454 O-Ring Size
$16.20
NW320 12.48 in. (317 mm) 0.28 in. (7 mm)
Buna-N O-Ring, NW400 Size ISO-MF Vacuum Flange, 2-460 O-Ring Size
$22.80
7 Weeks
NW400 15.48 in. (393 mm) 0.28 in. (7 mm)
7 Weeks
Buna-N O-Ring, NW500 Size ISO-MF Vacuum Flange, 2-468 O-Ring Size
$30
7 Weeks
NW500 19.46 in. (494 mm) 0.28 in. (7 mm)
7 Weeks
Buna-N O-Ring, NW630 Size ISO-BF Vacuum Flange, 2-474 O-Ring Size
$41
7 Weeks
NW630 24.94 in. (634 mm) 0.28 in. (7 mm)
7 Weeks

Please see o-ring schematic for dimension callouts.

Specifications

  • Component Type
    O-Ring
  • Series
    Series 76
  • Flange Type
    ISO-MF: (NW63 to NW500)
    ISO-BF: NW630
  • Material
    Buna-N

Features

Elastomer Seal Comparison

Buna-N Viton
Compound N674-70 V747-75
Color Black Black
Bakeout 80°C 150°C
Benefits Seals easier, lower cost High temperature, lasts longer

Viton® is recommended where temperatures, chemical resistance or long installed life make it beneficial. Use Buna-N where temperatures are moderate, and installed useful life is consistent with this material. The centering ring is available in stainless steel or aluminum. Use stainless steel where chemical resistance is needed. Flanges and seals are designed to be tightened to metal to metal contact.

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