Feedthrough terminal block, 231 Series, operating tool Enjoy seamless electrical installations with feedthrough terminal block (item number 231-641/017-000). Conductors can only be connected to feedthrough terminal block if their strip length is between 8 and 9 mm . Featuring one conductor terminal along with CAGE CLAMP®, this product outperforms the competition. Our CAGE CLAMP® connection offers a convenient and maintenance-free way to connect all types of conductors. You do not need to prepare the conductor in any way, such as crimping ferrules. The dimensions are (71.08 x 19 x 19.1) mm (width x height x depth). Depending on the conductor type, feedthrough terminal block is suitable for conductor cross sections ranging from 0.08 mm² to 2.5 mm². Tin is used for coating the contact surfaces. THT is used to assemble the feedthrough terminal block.