Click to enlarge3.38" OD Conflat Viewport 
(1) Annealed Copper Gasket
(1) Bolt Kit (338-BK)
(1) Left!

3-3/8" OD CF Conflat Flange
Ultra High Vacuum (UHV) Series Viewport
Conflat Flange Glass Viewport - VPA Series
Non-Profit Exclusive

• Zero Length
• Kodial Glass (alkali borosilicate 7056)
• 8 Bolt Holes
View Area: 1.4"
• Flange Thickness: 0.63"
• Glass Thickness: 0.14"
• View ports are Rated for Vacuum NOT Pressure

See Additional Product Usage Warnings Below

Always Use With Glass Conflat Viewports
• Washer With Each Bolt
• Annealed Copper Gasket (1) Supplied With Purchase

3.38" OD Conflat Viewport with Bolt Kit

UNV-338-VPA-KITPrice: $199.00University: $169.00
Conflat Flange (CF) Series Viewports
• Optical discs are Kodial Glass (alkali borosilicate 7056)
• Glass to Metal Seal (No Viton Gasket)
• Metal to Metal Weld

Repeated Bakeout Cycles to 350°F
• heating rate should not exceed 2-3° per minute


ALWAYS Use An Annealed Copper Gasket
• LDS Provides 1 With Each New Viewport Purchase

• Annealed Copper Gaskets are NOT the same as our standard Copper Gaskets: (-CG Part Number)

Caution Required When Using Viewports
• Viewports are Rated for Vacuum NOT Pressure

• All viewports are fragile and must be handled and mounted with extreme caution

• NEVER use a viewport that appears to be, or is known to be damaged

• Never scratch the viewing area; a weakened viewport may implode (or explode) under wrong conditions.

• A faulty viewport can cause serious injury

• Make sure the glass chosen has a reasonable transmission at the wavelengths of interest.

• Remember, what is not transmitted may be reflected or absorbed.

Contact LDS Vacuum with any questions:
Phone (407)862-4643 via Fax (407)862-8723 or

LDS Vacuum Products is a 100% woman owned company and
a certified Woman Owned Small Business (WOSB)
The logos and/or trademarks appearing on this page are not owned by or registered to LDS but, rather, designate products sold by LDS, and are owned and/or registered to the manufacturers or suppliers of the products.