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STB 300 Al/Cu 87910 SIMBLOCK threaded rail connector from the manufacturer Simet. The product catalog number is 81301002.
The STB series of aluminum threaded connectors is distinguished by a wide range of applications - they are used in industrial equipment, automation, wind turbines, solar technology and electrotechnical switchboards. Such high functionality provides significant advantages in wire connection technology. All STB series connectors are safe for the installer. STB threaded connectors have aluminum clamps. Thanks to the special coating, these terminals are not only suitable for aluminum conductors, but also for copper conductors.