KBR (Pipe Thread Hub)
The KBR hub is designed for new construction or retrofitting for Emergency Vehicle
Pre-emptive (EVP) detectors on mast arms, poles and other supporting members. The KBR Hub
meets the requirements of the National Electrical Code (NEC) 370-17b for grounding requirements.
The KBR Hub can be field located using the supplied removable template for the best-intended use
before attaching to the supporting member. No welding, sand blasting, or painting of the
supporting member is required from the installation of the KBR Hub. Since it is a standard female
¾” or 1” pipe thread, this hub can be used for several other applications, i.e. cameras,
banners, signs etc. The captive fasteners require a setting tool available from Frey Manufacturing
Corporation or your local tool supplier. The KBR hub comes packaged with casting, gasket,
bushing, captive fasteners, bolt sets, hole template and instructions. Drawings and additional
information is available from Frey Manufacturing Corp. The KBR and KBR1
hubs are stock items.