Industrial RCB400B Ground Bushing 4 Inch Zinc Plated Steel

AMFICO RCB400B is a 4-inch steel grounding bushing with an insulated throat designed for threaded rigid-conduit installations. The part fits a 4-inch trade-size conduit with 4" - 8 NPS threads and features an insulated throat to isolate the grounding path from the conduit, making it suitable for electrical distribution and service applications where a defined ground connection is required through threaded conduit. For the 4-inch model, exterior dimensions include A = 5-1/8 in, B (Hex) = 4-15/16 in, C = 3-3/4 in, and D = 1-1/16 in, reflecting a robust machined-steel body. The bushing is constructed from steel and, in this AMFICO family, is listed with zinc plating to resist corrosion in standard installations.