The Amphenol RJ Field series connectors are circular metal connectors designed for Ethernet Class D / CAT5e connections, suitable for Ethernet over twisted-pair networks in harsh environments. They feature a tri-start threading coupling system and are equipped with the RJStop® connection system, offering protection against shock, dust, and fluids. RoHS-compliant options are available for these connectors, which do not require hazardous on-field cabling or grounding.