Aluminium jam nut receptacle, Nickel plating, with male contacts

RT0718-23PNH AMPHENOL - Connector: circular, socket,plug; PIN: 23; male; w/o contacts; IP67

Aopin Chicago Binding Screws Binding Post Scrapbook Photo Albums Screw Post Fit for 0.16inch(4mm) Hole Dia, Female M3x16mm Butt Screw for Binding Leather Saddles Purses Belt Repair, Silver, 20 Sets

Aluminium plug, Nickel plating, with female contacts

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Why would you choose nickel plating for your fasteners? - UC Components, Inc.

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Aluminium plug, Nickel plating, with female contacts, polarization N