ISO-LFB Blank Flange

Blank flanges are manufactured with no weld prep and no tubing bore. They are commonly used to close unused ports or they are altered by customers with their own custom machining capability for a special use.


  • High Vacuum Rated to 1×10-8 Torr
  • Bakeable to 200°C
  • Compatible with all ISO standard vacuum flanges and fittings
  • Designed to fit standard inch tubing O.D.’s


  • Standard:
    • 304 Stainless Steel
    • 6061 Aluminum

Product Notes

  • Close off unused ports
  • Good choice for custom modification

Options (Contact us for price and availability)

  • Tapped bolt holes

*Dimensions are in inches unless otherwise specified

Part IDReference NumberA B Material 3D CADDrawingUnit PriceIn StockQty, Add To Cart
Part ID4500144Reference NumberLFB63-000A 5.12B 0.47Material 304 SST3D CADLoginDrawingLoginUnit Price$76.00Contact
Part ID4500153Reference NumberLFB63-000-ALA 5.12B 0.47Material 6061-T6 Aluminum3D CADLoginDrawingLoginUnit Price$56.00Contact
Part ID4500145Reference NumberLFB80-000A 5.71B 0.47Material 304 SST3D CADLoginDrawingLoginUnit Price$96.00Contact
Part ID4500154Reference NumberLFB80-000-ALA 5.71B 0.47Material 6061-T6 Aluminum3D CADLoginDrawingLoginUnit Price$72.00Contact
Part ID4500146Reference NumberLFB100-000A 6.5B 0.47Material 304 SST3D CADLoginDrawingLoginUnit Price$111.20Contact
Part ID4500155Reference NumberLFB100-000-ALA 6.5B 0.47Material 6061-T6 Aluminum3D CADLoginDrawingLoginUnit Price$79.20Contact
Part ID4500147Reference NumberLFB160-000A 8.86B 0.63Material 304 SST3D CADLoginDrawingLoginUnit Price$215.05Contact
Part ID4500156Reference NumberLFB160-000-ALA 8.86B 0.63Material 6061-T6 Aluminum3D CADLoginDrawingLoginUnit Price$140.25Contact
Part ID4500148Reference NumberLFB200-000A 11.22B 0.63Material 304 SST3D CADLoginDrawingLoginUnit Price$282.20Contact
Part ID4500157Reference NumberLFB200-000-ALA 11.22B 0.63Material 6061-T6 Aluminum3D CADLoginDrawingLoginUnit Price$165.752
Part ID4500149Reference NumberLFB250-000A 13.19B 0.63Material 304 SST3D CADLoginDrawingLoginUnit Price$399.503
Part ID4500158Reference NumberLFB250-000-ALA 13.19B 0.63Material 6061-T6 Aluminum3D CADLoginDrawingLoginUnit Price$255.002
Part ID4500150Reference NumberLFB320-000A 16.73B 0.79Material 304 SST3D CADLoginDrawingLoginUnit Price$892.80Contact
Part ID4500159Reference NumberLFB320-000-ALA 16.73B 0.79Material 6061-T6 Aluminum3D CADLoginDrawingLoginUnit Price$562.50Contact
Part ID4500151Reference NumberLFB400-000A 20.08B 0.79Material 304 SST3D CADLoginDrawingLoginUnit PriceRequest a QuoteContact
Part ID4500160Reference NumberLFB400-000-ALA 20.08B 0.79Material 6061-T6 Aluminum3D CADLoginDrawingLoginUnit PriceRequest a QuoteContact
Part ID4500152Reference NumberLFB500-000A 24.02B 0.79Material 304 SST3D CADLoginDrawingLoginUnit PriceRequest a QuoteContact
Part ID4500161Reference NumberLFB500-000-ALA 24.02B 0.79Material 6061-T6 Aluminum3D CADLoginDrawingLoginUnit PriceRequest a QuoteContact