This is an authentic OEM component from Campbell Hausfeld. The oil drain cap is constructed of metal, and is fitted onto the oil drain extension. This cap is sold individually, and an adjustable wrench is helpful with the repair.
This is an authentic Campbell Hausfeld replacement part, sourced from the original manufacturer for use with air compressors. The special set screw is commonly used to secure the pump's flywheel. This set screw is available as an individual replacement part, please see model diagram for associative parts.