REINFORCING RING FOR A PLASTIC FITTING AND PLASTIC FITTING INCORPORATING A REINFORCING RING

摘要

A reinforcing and a plastic fitting incorporating such a reinforcing ring ar e disclosed. The reinforcing ring and plastic fitting have particular utility with respect to fire sprinkler heads in buildings. The reinforcing ring has a single starter thread which is integrally formed with a guide portion which guides a male part to be axially in line with the female fitting.