SurLok Plus™ Heavy-Duty Power Connectors Amphenol Industrial SurLok Plus™ Heavy-Duty Power Connectors are IP67-rated, field installable, highly reliable connectors offering industry-standard crimp, screw, and busbar termination options. There is no need for special torque tools. The SurLok components feature a quick-lock and press-to-release function and a 'keyway' design to prevent incorrect mating. Amphenol SurLok Plus Connectors incorporate the R4 RADSOK® technology. This technology utilizes the high tensile strength properties and forms a high-conductivity alloy grid to produce low insertion forces while maintaining a large conductive surface area.