
- A: 5.91 in / 150.0 mm
- B: 6.01 in / 152.60 mm
- C: 0.31 in / 8 mm
- D: 0.15 in / 3.9 mm
The ISO Centering Rings are available in the following sizes: ISO 63, ISO 80, ISO 100, ISO 160, ISO 200, ISO 250, ISO 320, ISO 400, ISO 500.
The ISO Centering Rings are available in Stainless Steel or Aluminum.
ISO Flange Series are comprised of two smooth face flanges clamped together with a combination of metal centering rings, and elastometric O-Rings




Half Nipple - Long, KF 16 (NW 16), Stainless Steel
Half Nipple - Long, KF 10 (NW 10), Stainless Steel
Half Nipple - Long, KF 50 (NW 50), Stainless Steel
Half Nipple - Long, KF 40 (NW 40), Stainless Steel
Wholesale 6.3" Bored Blank Flange, Stainless Steel, KF160 (NW160)
ISO Centering Ring, ISO 80, Stainless Steel
Stainless Steel 316,KF-16 Vacuum Bellows Hose, 40 Inch, Flexible Coupling, ISO-KF Flange Size NW-16
Wholesale 3" Bored Blank Flange, Stainless Steel, KF80 (NW80)
Flexible Hose Coupling, Unbraided Vacuum Hose, KF 16 (NW 16), Stainless Steel Vacuum Fitting, 20", 500mm
NW/KF40 Aluminum Flange Clamp + Centering O-rings with Fluorine Rubber
Flexible Hose Coupling, Unbraided Vacuum Hose, KF 16 (NW 16), Stainless Steel Vacuum Fitting, 40", 1000mm
ISO Centering Ring, ISO 200, Stainless Steel 
