![Ideal Spectroscopy | Centering Ring KF-16 Vacuum Fittings, ISO-KF Flange Size NW-16, Stainless Steel & Buna, O-Ring Ideal Spectroscopy | Centering Ring KF-16 Vacuum Fittings, ISO-KF Flange Size NW-16, Stainless Steel & Buna, O-Ring](https://www.idealvac.com/files/images/CenterRingKF16.jpg)
Ideal Spectroscopy | Centering Ring KF-16 Vacuum Fittings, ISO-KF Flange Size NW-16, Stainless Steel & Buna, O-Ring
![Ideal Vacuum | One Sided Centering Ring Assembly, NW-200 Vacuum Fittings, Stainless Steel with Viton® O-Ring ISO-02-124 Ideal Vacuum | One Sided Centering Ring Assembly, NW-200 Vacuum Fittings, Stainless Steel with Viton® O-Ring ISO-02-124](https://www.idealvac.com/files/images/Centering-Ring--One-Sided-O-Ring_01.jpg)
Ideal Vacuum | One Sided Centering Ring Assembly, NW-200 Vacuum Fittings, Stainless Steel with Viton® O-Ring ISO-02-124
![810001, Centering Ring, NW100, ISO LF, Large Flange, Fluorocarbon-based fluoroelastomer (FKM / FPM), 304ss | MDC Precision | MDC Precision 810001, Centering Ring, NW100, ISO LF, Large Flange, Fluorocarbon-based fluoroelastomer (FKM / FPM), 304ss | MDC Precision | MDC Precision](https://www.mdcprecision.com/media/catalog/product/cache/4ed3665eb49b6d2f975d77affd7b0bfd/3/5/351010_cr_a_2.jpg)
810001, Centering Ring, NW100, ISO LF, Large Flange, Fluorocarbon-based fluoroelastomer (FKM / FPM), 304ss | MDC Precision | MDC Precision
![Ideal Vacuum | ISO 63 Centering Ring Stainless Steel with Viton O-Ring, NW-63 Vacuum Flange Size, Typically Used With 2.5 Inch O.D. (63.50 mm) Tubing Ideal Vacuum | ISO 63 Centering Ring Stainless Steel with Viton O-Ring, NW-63 Vacuum Flange Size, Typically Used With 2.5 Inch O.D. (63.50 mm) Tubing](https://www.idealvac.com/files/images/LF-Centering-Ring-63-80-100.jpg)
Ideal Vacuum | ISO 63 Centering Ring Stainless Steel with Viton O-Ring, NW-63 Vacuum Flange Size, Typically Used With 2.5 Inch O.D. (63.50 mm) Tubing
Centering Ring KF 25 With Viton® O-Ring, KF 25 (NW 25), Stainless Steel, The centering ring contains a rubber elastomeric o-ring. Those are also recognized as NW10, NW16, NW25, NW40, or KF-10
![Centering Ring, NW25, Fluorocarbon-based fluoroelastomer (FKM / FPM), Aluminum | MDC Precision | MDC Precision Centering Ring, NW25, Fluorocarbon-based fluoroelastomer (FKM / FPM), Aluminum | MDC Precision | MDC Precision](https://www.mdcprecision.com/media/catalog/product/cache/4ed3665eb49b6d2f975d77affd7b0bfd/7/1/710014.jpg)
Centering Ring, NW25, Fluorocarbon-based fluoroelastomer (FKM / FPM), Aluminum | MDC Precision | MDC Precision
![Centering Rings 54mm to 75mm [13424] - $8.69 : Apogee Rockets, Model Rocketry Excitement Starts Here Centering Rings 54mm to 75mm [13424] - $8.69 : Apogee Rockets, Model Rocketry Excitement Starts Here](https://www.apogeerockets.com/bmz_cache/d/dfc4c4696166944c0e55e4bdfcee3ae0.image.700x361.jpg)