Bus Connection Hardware for CCB/AV1 Panelboards. Mounts One (1) TKM Frame Circuit Breaker, 800A Max -Kit # TKM8K replaces OEM TK8SPK. All kits come complete with detailed safety and installation instructions and include all necessary screws, brackets, and a deadfront cover plate. If additional 17" wide blank filler plates are needed see BFPCCB1, BFPCCB2 and BFPCCB3.