These chromatography fittings of nuts and washers are used with flanged tubing. Flanged nuts are available in Delrin® acetal to resist cross-threading or loosening while in use or choose ethylene tetrafluoroethylene (ETFE) for chemically aggressive environments. The nuts come with stainless steel washers.

Use with flanged tubing. Delrin acetal nuts resist cross threading or loosening during use.