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The ARB central compression nut for 3.5–5.0mm tubing is a threaded component designed to clamp a range of tube diameters within compression fittings. It enables a sealed joint across that size span and is useful when assembling or repairing ARB-compatible lines that use central compression-style fastening. Keep it for flexible fitment needs during service or installation.
ARB Compression Nut Central 3.5-5.0mm
