This nut is designed for fastening the water pump pulley on Citroën 15CV engines. The part provides a secure connection between pulley and shaft. The thread uses a metric size matched to the original engine design. The head shape allows fitting and removal with standard workshop tools. The material suits use in the engine bay and tolerates operating temperatures and loads during extended running. The nut is suitable for maintenance, overhaul or replacement of the cooling drive via the water pump pulley. It supports correct alignment and retention of the pulley on the front of the engine and keeps the drive system in working order.
