Insulated, rigid 4mm socket connector, with gold-plated contacts and a 1.9mm solder pin. Suitable for accepting spring-loaded 4mm plugs with rigid insulating sleeve. Socket made from brass. Push-fit mounting into cutout holes in plates or housings made of plastic, metal etc. https://elecena.pl/product/28044001/st-xe4-ubli-233160-23-seb4-f-a-safety-jack-socket-blue-built-in-insulated-xd8-4-mm 2025-03-19 https://elecena.pl/product/28044001/st-xe4-ubli-233160-23-seb4-f-a-safety-jack-socket-blue-built-in-insulated-xd8-4-mm 2025-11-13 https://elecena.pl/product/28044001/st-xe4-ubli-233160-23-seb4-f-a-safety-jack-socket-blue-built-in-insulated-xd8-4-mm 2026-06-09 https://elecena.pl/product/28044001/st-xe4-ubli-233160-23-seb4-f-a-safety-jack-socket-blue-built-in-insulated-xd8-4-mm 2026-07-25