description:
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<br /> kf-25 nw-25 vacuum center ring w/ o-ring
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<br /> item specifics:
<br />  these kf-25 centering ring vacuum fittings follow iso-kf standards and have a flange size of nw-25. they are commonly used to build foreline vacuum plumbing and process systems. they are often called quick flange fittings because they are quick to assemble. a circumferential clamp and centering ring form the vacuum seal between the connecting flanges. the centering ring contains a rubber elastomer o-ring. the standard sizes for quick flange fittings are kf-10, kf-16, kf-25, kf-40, and kf-50 with flange sizes nw-10, nw-16, nw-25, nw-40, and nw-50, respectively. they are made of corrosive resistant stainless steel with o-ring. 
<br />   items
<br />  internal diameter "a" - kf25 0.984" 25mm 
<br />  centering ring is made of aluminum
<br />  o-ring is made of buna-n material
<br /> color: as shown in picture
<br />  1cm=0.39inches 
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<br /> package included:
<br /> 10 pcs kf-25 nw-25 vacuum center ring w/ o-ring
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<br /> note:
<br /> 1.please allow 1-3cm error due to manual measurement. please make sure you do not mind before you bid.
<br /> 2.the colors may have different as the difference display, please understand.<p> <b><b><img src="https://contestimg.wish.com/api/webimage/584112405e2d344f8761e8e1-large.jpg"><img src="https://contestimg.wish.com/api/webimage/584112405e2d344f8761e8e1-1-large.jpg"><img src="https://contestimg.wish.com/api/webimage/584112405e2d344f8761e8e1-2-large.jpg"><img src="https://contestimg.wish.com/api/webimage/584112405e2d344f8761e8e1-3-large.jpg"><img src="https://contestimg.wish.com/api/webimage/584112405e2d344f8761e8e1-4-large.jpg"><img src="https://contestimg.wish.com/api/webimage/584112405e2d344f8761e8e1-5-large.jpg" noproxy><img src="https://contestimg.wish.com/api/webimage/584112405e2d344f8761e8e1-6-large.jpg></b></b></p>