Circular connectors are rugged, multi-pin electrical connectors designed for industrial environments. Featuring threaded couplings for secure mating, these connectors provide reliable power, signal, and data transmission in harsh conditions. Common in automation, military, aerospace, and heavy machinery applications, their circular design offers 360-degree EMI shielding and superior strain relief compared to rectangular alternatives. Key variants include MIL-SPEC, DIN, and metric standards with IP67/IP68 ratings for dust/water resistance.