Single Ferrule Fitting is a three piece design consisting of a body portion,
a coupling nut and a ferrule. During the assembly the
nut is progressively tightened
causing hardened ferrule to slide along
the inner conical seat of the body and grip the tube.
Tightened the nut, ring deforms due to 24° cone of fittings and bites
into the steel tube, producing deep cut on the tube. The cut is
visible on the outer diameter of the tube. This cut on the
tube acts as metallic interlock and makes the joint leak
roof at high pressure and under vibration.