COMPRESSION FITTING WITH TORQUE NUT

摘要

A torque nut with an axially deformable projection protruding from the axially inner end face of the torque nut. The torque nut may be assembled as part of a compression fitting including one or more ferrules for engaging a tube held within the torque nut and a fitting body onto which the torque nut can be threaded. The axially deformable projection will engage an opposing face on the fitting body and this allows a person tightening the torque nut to to feel when the torque nut is madeup to prevent undermaking or overmaking the torque nut. When the axially deformable projection engages the fitting body, there will be an abrupt increase in torque needed to tighten the torque nut on the fitting body after only partial axial deformation of the axially deformable projection relative to the axially inner end face of the torque nut.

主权项

1. A tube fitting assembly comprising:
a fitting body having an axially inner threaded end portion and a cavity opening to an axially inner end face of the fitting body for receiving an end of a tube, the fitting body having an axially inwardly facing shoulder radially offset from the axially inner threaded end portion; a ferrule assembly for sealing to the tube, the ferrule assembly and fitting body, when axially urged towards one another, having cooperating surfaces for radially inwardly compressing the ferrule assembly around to tube to form a seal with the tube; and the torque nut of claim 5.