Double Flange Bolts


  • High Vacuum Rated to 1×10-8 Torr
  • Compatible with all ISO standard vacuum flanges and fittings
  • Offers good lateral load strength, but requires more than one bolt set per flange connection.


  • Hardware (bolts, nuts, and washers): stainless steel

Product Notes

  • Fastens ISO-LF flanges
  • Bolt kits include all of the bolt sets you will need for 1 ISO-LF sealing assembly

*Dimensions are in inches unless otherwise specified

Part IDReference Number# Per Set Bolt Size 3D CADDrawingUnit PriceIn StockQty, Add To Cart
Part ID0604501Reference NumberLFB63-DFB# Per Set 4Bolt Size M8x403D CADLoginDrawingLoginUnit Price$16.50Contact
Part ID0604502Reference NumberLFB80/100-DFB# Per Set 8Bolt Size M8x403D CADLoginDrawingLoginUnit Price$20.00Contact
Part ID0604503Reference NumberLFB160-DFB# Per Set 8Bolt Size M10x503D CADLoginDrawingLoginUnit Price$24.50Contact
Part ID0604504Reference NumberLFB200/250-DFB# Per Set 12Bolt Size M10x503D CADLoginDrawingLoginUnit Price$36.50Contact
Part ID0604505Reference NumberLFB320-DFB# Per Set 12Bolt Size M12x603D CADLoginDrawingLoginUnit Price$60.00Contact
Part ID0604506Reference NumberLFB400/500-DFB# Per Set 16Bolt Size M12x603D CADLoginDrawingLoginUnit Price$75.00Contact