KF-40/ NW-40 Vacuum Fittings, Vacuum Center Ring Made of Aluminum, O-ring = FKM Viton ( lot of 10pcs, Color May Vary)

NW40 centering ring made of Aluminum with Buna-N O-RingCenter ring-Made of AluminumO-ring-FKM VitonFKM is commonly called viton by DuPont. FKM/Viton is good for wear & chemical resistance.Working temp is -20°C to 220°CElastomer 0-Ring ComparisonsVITON Advantage: Excellent chemical & heat resistance. Good mechanical & compression set resistance.Notice:1.Please allow 1-3mm error due to manual measurement.pls make sure you do not mind before you bid.2. The colors may have difference due to the different display and camera, pls understand.

• A circumferential clamp and centering ring form the vacuum seal between the connecting flanges. The centering ring contains a rubber elastomer o-ring.
• O-ring Made of Viton (fluorocarbon elastomer) for use with a variety of chemicals and fuels.
• This O-ring is round cross-section to provide a seal between cylindrical overlapping surfaces. It works well in high vacuum environments
• Centric Wheel Made out of High Quality Aluminum so it will not bend & ensure a tight fit.
• Excellent resistance to aging and ozone. Low gas permeability, low compression set.