|Thickness||16mm||Bolt Hole Circle||3.5″|
Here are some stainless steel high vacuum blank off flanges. These are 4.5″ in diameter and have a 3.5″ bolt hole circle as shown. They don’t appear to be a standard conflat size, but are close. The flanges are 16mm thick and were designed to seal against an o-ring on the mounting surface. These have some light scratches, but are otherwise in excellent functional and cosmetic shape as shown.
Location; C 0507 14-8ListC