Audio Jack, 2 x switching (normalling) stereo jack without switching contact, horizontal PCB mount, retention spring instead of the cylinder having the rounded top edge. [mm] top_rounding_radius = 8; // Cylinder faces to use 7.5mm holes, not 6mm - alpha pots - 9.8mm, +2mm rotary - 11.5mm, +3.5mm -- biggest by far, maybe 12.6mm? SR2511 series are 11.43? Maybe more? Distance between pcb and front panel, vertical PCB mount, https://www.neutrik.com/en/product/ncj10fi-v-0 Combo I series, 3 pole female XLR receptacle, grounding: mating connector shell to pin1 and front panel, vertical PCB mount, https://www.neutrik.com/en/product/nc3mamh-ph speakON Combo, 2 pole chassis connector, metal housing, vertical PCB mount, replaces NLJ2MD-V, https://www.neutrik.com/en/product/nlj2mdxx-v speakON Chassis Connectors, 2 pole chassis connector, grey D-size flange, self tapping screw holes (A-screw), horizontal PCB mount, black chrome shell, https://www.neutrik.com/en/product/nc3fbh2-b B Series, 3 pole female XLR receptacle, grounding: mating connector shell and front panel, lateral right PCB mount, https://www.neutrik.com/en/product/nc3fahr1 A Series, 3 pole female XLR receptacle, grounding: separate ground contact to mating connector shell and front panel, vertical PCB mount, replaces NL8MD-V-1, https://www.neutrik.com/en/product/nl8mdxx-v-3 speakON Chassis.