Adaptive Bolt Ring

Adaptive bolt rings allow vacuum users to convert directly from one style of ISO-LF fastening flange to another without the purchase of an adaptive fitting. This saves money and reduces the space needed to accomplish the flange adaptation within your system. The ANCORP adaptive ISO fastener can convert a bolted or claw clamp-style ISO-LF flange directly to a quick clampflange for the same tubing diameter (e.g. an LF80-300-SF can adapt directly to a QF80-300-SF).


  • High Vacuum Rated to 1×10-8 Torr
  • Compatible with all ISO standard vacuum flanges and fittings


  • Body: Aluminum

Product Notes

  • Converts ISO-LF flanges to rotatable ISO-LFB flanges
  • O.D. and bolt pattern match ISO-LFB flanges

*Dimensions are in inches unless otherwise specified

Part IDReference NumberThickness Outer Dimensions 3D CADDrawingUnit PriceIn StockQty, Add To Cart
Part ID4001086Reference NumberQF63-250-ABRThickness 0.47Outer Dimensions 5.123D CADLoginDrawingLoginUnit PriceRequest a Quote1
Part ID4001087Reference NumberQF80-300-ABRThickness 0.47Outer Dimensions 5.713D CADLoginDrawingLoginUnit PriceRequest a QuoteContact
Part ID4001088Reference NumberQF100-400-ABRThickness 0.47Outer Dimensions 6.53D CADLoginDrawingLoginUnit PriceRequest a QuoteContact
Part ID4001089Reference NumberQF160-600-ABRThickness 0.47Outer Dimensions 8.863D CADLoginDrawingLoginUnit PriceRequest a QuoteContact
Part ID4001090Reference NumberQF200-800-ABRThickness 0.47Outer Dimensions 11.223D CADLoginDrawingLoginUnit PriceRequest a QuoteContact