These rotatable bolt ring adapters are for making non bolted ISO-K collar flanges into ISO-F smooth bolt hole flanges. Standard ISO LF NW Centering Rings can be used.  The NW-63 ISO-KF 63 flange has 4 bolt holes. They follow International Standards Organization (ISO) standards and have a flange size of NW-63. ISO flanged vacuum fittings are commonly used to build process vacuum plumbing and systems for industrial applications. The fittings are quick to assemble using double claw clamps or bolts and a centering ring. The centering ring contains a rubber/elastomeric o-ring. The ISO standard sizes for large flanges are NW-63, NW-80, NW-100, NW-160, NW-200, NW-250, NW-320, NW-400, NW-500, NW-630. These vacuum flanges are made of non-corrosive aluminum.

Rotatable Bolt Ring, NW-63 Vacuum Fittings, ISO-LF Large Flange Size NW-63, Aluminum

ISO-LF Flange Size: NW-63 with four bolt holes.

Material: Aluminum with steel retaining ring.