Captive stainless steel hex head slotted screws|Plug mechanical cable clamps prevent strain on cables, they meet or exceed UL strain relief pull-out requirements|Insulators provide superior dielectric and mechanical strength and lowest arc tracking|Delayed action construction: Insert plug partially rotate slide on front of receptacle and insert plug fully|External seals not required|CPS series plug and receptacles are supplied with pressure terminal connectors|Energizes receptacle terminals deeply recessed to prevent accidental touching|copper-free aluminum cover|Malleable iron mounting bodies|Insulating blocks: Fiberglass reinforced thermoset polyester|Neoprene cover gasket and plug grommet|Malleable iron mounting bodies: Triple coat (1) zinc electroplate, (2) chromate and (3) epoxy powder coat|Epoxy powder coated aluminum covers|Constructional feature explosionproof and dead-front safety|Factory sealed|Surface mount