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062 MINSTAC Preparation and Installation Procedures

Boss Preparation

The fitting boss required for the 062 MINSTAC coupling may be produced with the Lee Combination Drill Part Number TTTA3200643A. The drill was designed for use in plastics and soft metals. It produces a boss (excluding the threads) with the proper configuration and dimensions. The boss may be produced as follows:

Boss Preparation Tools

Combination Boss Drill: TTTA3200643A
Plug Tap: TTTA3200743A
Bottoming Tap: TTTA3200843A


  1. Drill a 0.035" (0.89 mm) diameter pilot hole in the desired boss location.
  2. Insert the front of the Lee Combination Boss Drill Part Number TTTA3200643A into the pilot hole and drill down until the 0.187" (4.75 mm) diameter spotface cleans up the surface of the boss. All diameters should be concentric within 0.006" (0.15 mm) T.I.R. The sealing surface should be smooth with no burrs or tool marks.
  1. Tap the 0.138-40 unfinished threads using the Lee Plug Tap Part Number TTTA3200743A first and the Lee Bottoming Tap Part Number TTTA3200843A second. These taps incorporate stops to avoid damaging the sealing surface. The boss is now complete.


NOTE: Care must be taken to ensure that the taps will follow true in hole produced by the Combination Drill.

Unless otherwise specified, dimensions are in inches [mm].

062 MINSTAC Tubing Preparation and Coupling Assembly


Coupling Assembly Tools

Chamfer Tool
Collet Tool*


  1. Cut the tubing to the desired length. The cut should be reasonably square.
  2. Slide the Coupling Screw (Part Number TMAA320207_ Z) over the end of the tubing, with the threaded end facing the tubing end. Place the collet into Tool* (Part Number TTTA3201443A) counterbore end first.

    * The Lee Collet Tool (Part Number TTTA3201443A) is for use with 0.032" (0.81 mm) I.D. tubing. The following tools should be substituted for use with their respective sized tubing:
    1. TTTA3201743A: 0.012" (0.30 mm) I.D. tubing
    2. TTA4000143A: 0.040" (1.02 mm) I.D. tubing
  3. While holding the tubing with the rubber Tubing Grip (Part Number TTTX0500900A), screw the Collet onto the tubing end. This should require about 15-20 turns of the Collet Tool. Remove the tool from the coupling end and check that the tubing extends at least to the end of the collet.

  4. Using the Lee Chamfering Tool* (Part Number TTTA3201543A), place the pilot pin into the tubing assembly. Rotate the tool while applying a small axial force in a clockwise direction until it bottoms out against the Collet (already installed on
    the tubing).

    * The Chamfer Tool (Part Number TTTA3201543A) is for use with 0.032" (0.81 mm) I.D. tubing. The following tools should be substituted for use with their respective sized tubing:

    TTTA3201643A: 0.012"
    (0.30 mm) I.D. tubing

    TTTA4000243A: 0.040"
    (1.02 mm) I.D. tubing

  5. Slide the Coupling Screw over the Collet.
  6. Push the Ferrule (Part Number TMBA3202910Z) onto the Ferrule installation end of the Lee Chamfer Tool (Part Number TTTA3201543A).

  7. While holding the Coupling Screw, insert the Ferrule into the Coupling Screw (approx. 4 lbs. (1.8 kg.) force is required). The Ferrule will "snap" in place. The coupling assembly is now complete.


Unless otherwise specified, dimensions are in inches [mm].

062 MINSTAC Coupling Installation


Coupling Installation Tools

Torque Wrench


  1. Start threading coupling assembly into the 062 MINSTAC fitting boss by hand.

  2. Tighten the fitting between 5 to 10 ozf•in (0.035 to 0.07 N-m) by slipping the Lee Torque Wrench (Part Number TTTA3201243A) onto the knurled Coupling Screw. The minimum torque is achieved by pressing the shorter torque arm clockwise until it just contacts the longer arm. To check that maximum recommended torque is not exceeded, invert the Torque Wrench and press the longer torque arm clockwise until the Coupling Screw begins to move. This should occur before the torque arms make contact. After gaining a feel for the proper torque, use of the Torque Wrench may be discontinued.

Minimum recommended torque: 5 ozf•in (0.035 N-m)
Maximum recommended torque: 10 ozf•in (0.07 N-m)

Unless otherwise specified, dimensions are in inches [mm].