Description
Stainless Steel Vacuum Flange Tube 20.5in OD 33mm ID 16mm 3/4 OD SS NW16
This is a stainless steel vacuum flange tube measuring 20.5 inches in overall length, featuring an NW16/KF16-style flange at one end and an open plain end at the other. The tube is constructed from polished stainless steel and is designed for use in vacuum system plumbing, chamber feedthroughs, and similar ultra-high or rough-vacuum applications where clean, non-contaminating metalwork is required.
Specifications & What's Included
- Material: Stainless steel (polished)
- Overall length: 20.5 in.
- Tube outer diameter (OD): 3/4 in. (~19mm)
- Flange outer diameter: 33mm
- Inner diameter (ID): 16mm
- Flange type: NW16 / KF16 (ISO-KF series) — 6-bolt hole pattern
- Flanged end: bolt-circle pattern visible in photos; face shows light surface discoloration from prior service
- Plain open end: clean bore, no visible deformation
- Includes: tube only — no clamps, centering rings, gaskets, or fittings included
Applications
Vacuum flange tubes of this type are standard plumbing components in research and industrial vacuum systems — including diffusion-pumped and turbomolecular-pumped chambers used in semiconductor processing, thin-film deposition (PVD/CVD), surface science, mass spectrometry, and electron microscopy. The NW16/KF16 flange standard (ISO-KF) is one of the most widely used quick-flange connections in the vacuum industry, compatible with KF16-series clamps, centering rings, and fittings from suppliers such as Lesker, MDC, and Pfeiffer. The stainless steel construction is chosen for its low outgassing rate, corrosion resistance, and cleanability — all essential in systems that must reach and hold medium to high vacuum levels. Tubes like this are used as feedthroughs, extension arms, port adapters, and connection sections between chamber ports and pumping or instrumentation lines.
This stainless steel vacuum flange tube (20.5 in., 33mm flange OD, 16mm ID) has been inspected and is in good used condition. It was pulled from a working vacuum system where it was previously in service. The flange face shows some light surface discoloration and minor marks consistent with normal use, as visible in the photos. The tube body is straight and the bore is open and clear. Please view our photo set and contact us if you have any questions.
Warranty Information
Additional Information
Brand: |
Unbranded |
Model: |
SS 20.5 Vacuum Flange Tube |
Type: |
Vacuum Flange Tube |
Material: |
Stainless Steel |
Overall Length: |
20.5 in. |
Tube Outer Diameter (OD): |
3/4 in. (approx. 19mm) |
Flange Outer Diameter: |
33mm |
Inner Diameter (ID): |
16mm |
Flange Type: |
NW16 / KF16 (ISO-KF) |
Flange Bolt Holes: |
6-bolt pattern (visible in photos) |
Application: |
Vacuum chamber, vacuum system plumbing |
SKU: |
38373 |
Seller Notes: |
Tube only — no fittings, clamps, or gaskets included. |
Country/Region of Manufacture: |
Unknown |
Condition Notes: |
This SS vacuum flange tube (20.5 in., 33mm OD flange, 16mm ID) is in good used condition. Pulled from a working vacuum system. Light surface discoloration on flange; tube body straight and bore clear. Please contact us with any questions. |
California Prop 65 Warning: |
WARNING: This product can expose you to chemicals including lead and lead compounds, and DEHP (a phthalate), which are known to the State of California to cause cancer and birth defects or other reproductive harm. Go to P65Warnings.ca.gov |
