Insert and system for providing a calibrated metering orifice

An insert for connecting first and second parts each having holes comprising:

• a cylindrical sleeve having a central void and an outer diameter sized to fit into the hole in the first part, the central void having a uniform diameter across a length of the cylindrical sleeve;
• and
• a core having a through-hole and a tapered outer wall which is smooth, the through-hole having a threaded portion with a first diameter and a second portion having a diameter smaller than the first diameter wherein when the core is pulled axially into the cylindrical sleeve such that the tapered outer wall slides axially within the cylindrical sleeve, the cylindrical sleeve expands against the hole of the first part to secure the insert to the first part;
• the threaded portion is at a first end of the core and engages with the threads to secure the second part to the first part.

A method of installing an insert to provide a calibrated metering orifice comprising the steps of:

• providing an insert with a core and a cylindrical sleeve having a through-hole and a tapered outer wall which is smooth, the through-hole having a threaded portion with a first diameter and a second portion having a diameter smaller than the first diameter;
• coupling a threaded rod to the threaded portion of the through-hole of the core;
• inserting the insert into an installation hole of a first part, the first part being a manifold;
• pulling the core axially into the cylindrical sleeve wherein when the core is pulled axially into the cylindrical sleeve such that the outer wall slides axially within the cylindrical sleeve, the cylindrical sleeve expands against the hole in the manifold to secure the insert to the manifold;
• and
• removing the threaded rod from the threaded portion of the through-hole.