Buttweld Concentric Reducer 4.0 to 2.5 Inch OD, Weld-On, Stainless Steel.

These MKS buttweld vacuum fittings are designed to be used in conjunctions with full line of ISO-Universal, ISO-KF and CF UHV Flanges, and are Easily welded to the flanges or each other during on-site installations. All components are made of type 304 stainless steel and are specifically prepared for use in high vacuum process or UHV applications.

Vacuum buttweld fittings are designed to be used in any vacuum applications where minimizing the number of sealed joints is critical.

Semiconductor wafer fabrication areas for remote installations and below a raised floor.
Permanent house vacuum vacuum lines
Vacuum utility lines for vacuum fixtures.
High temperature lines.
Burn box exhaust lines.

Concentric Reducer Common Dimensions:

OD: 4.0" x 2.5"
Wall Thickness: 0.083 in x 0.065 in (2.11 x 1.65 mm)
A: 3.625 in (92.10 mm)