Two models. Both share the glass sintering process, excellent sealing performance, commonly used in aerospace system vacuum field data detection, unaffected by external environmental factors like humidity or vibration, blocking all noise. Both models have extended sockets, wall penetration thickness up to 12mm, avoiding extensive panel milling as in the past to reduce compressive strength. The Y27-2255ZJBH is a flange socket, secured with four screws, gold-plated surface for aesthetics and antioxidant shielding, easily connected and disconnected with the plug. The Y39-55CZJ circular flange, secured with six screws, uses a threaded locking method, offers smooth insertion and removal, and stable signal transmission.