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Nitrogen Tank nut for Nitrogen regulators (Regulator Replacement Parts and Accessories) Usually used in Nitrogen regulator ✔️Material: Brass ✔️Reverse Thread ✔️0.83" (13/16") ✔️Compatible to CGA 330 (Antimony Pentafluoride, Boron Trifluoride, Carbonyl Sulfide, Deuterium Chloride, Deuterium Sulfide, Hexafluoroacetone, Hydrogen Bromide, Hydrogen Chloride, Hydrogen Iodide, Hydrogen Sulfide, Methyl Bromide, Methyl Mercaptan, Nitrogen Trifluoride, Nitrosyl Chloride, Nitrosyl Fluoride, Nitryl Fluoride, Phenylcarbylamine Chloride, Phosphorous Pentafluoride, Phosphorous Trifluoride, Silicon Tetrafluoride, Sulfur Tetrafluoride, Trifluoroacetyl Chloride, Uranium Hexafluoride) ✔️CGA 350(Arsine, Carbon Monoxide, Deuterium, Deuterium Selenide, Diborane, 1,1 Difluoroethylene, Ethane, Ethylene, Germane, Hydrogen, Hydrogen Selenide, Methane, Methyl Fluoride, Methylene Fluoride, Natural Gas, Pentaborane, Phosphine, Silane, Stibine, Tetrafluoroethylene, Vinyl Fluoride) ✔️Compatible to almost of regulators and valve ✔️High quality If you need replacement parts or accessories for your primary or secondary regulator, we've likely got what you're looking for. If you need a part that is not listed below, feel free to contact us and we'll help you find what you need.