062 MINSTAC - Boss Preparation

062 Boss Configuration


062 Boss Preparation Tools

Combination Boss Drill TTTA3200643A


Plug Tap TTTA3200743A


Bottoming Tap TTTA3200843A




062 MINSTAC Boss Preparation

The fitting boss required for the 062 MINSTAC coupling may be produced with the Lee Combination Drill part no. TTTA3200643A. The drill was designed for use in plastics and soft metals. It produces a boss (excluding the threads) with the proper configuration & dimensions. The boss may be produced as follows:

Procedure:
1. Drill a 0.035" (0.89 mm) dia. pilot hole in the desired boss location.

2. Insert the pilot diameter of the Lee Combination Boss Drill (part number TTTA3200643A) into the pilot hole & drill down until the 0.187" (4.75 mm) dia. 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.

3. Tap the 0.138-40 unfinished threads using the Lee Plug Tap (part number TTTA3200743A) first and the Lee Bottoming Tap (part no. 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 follow true in the hole produced by the Combination Drill.
For more information, please send us your application information via our ASK LEE service. Or contact our application engineers in the USA at 1-800-LEE-PLUG or our representatives around the world.
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