Available for single-hole fixing (double “D” profile, diameter 11.2mm with two flats on opposite sides 9.6mm apart), in both BNC-solder and BNC-BNC (“back-to-back”) types. Both are uninsulated from the panel, but coloured pairs of plastic isolating washers are also available, suitable for both types. Panel hole diameter for washers is 12.8mm with two flats on opposite sides 11.2mm apart.