Allen-Bradley 855T-BCB Surface Mount Base 1 2 NPT

The Allen-Bradley 855T-BCB is a black, surface-mount base that forms the foundational mounting element for the 855T control-tower stack-light family, enabling quick panel installation and a clean appearance in control panels and enclosures. It features a 1/2-inch NPT conduit mount, allowing secure conduit connection and wiring access from the back, and is supplied without a cap (No Cap), aligning with the standard-base configuration for 855T bases. The base is designed to mate with 70 mm stack-light assemblies and is listed as a surface-mount base with no integrated cap or cable harness beyond the standard base, which simplifies field wiring and reduces component count. Official Rockwell/Allen-Bradley documentation and multiple distributor listings corroborate the 855T-BCB as the black surface-mount base variant of the 855T line, suitable for panel-mounted industrial signaling installations. Typical applications include machine control panels, packaging lines, and process equipment where visible status indicators and durable, field-installable mounting are essential.