Helicoil
Helicoil 4687-6 Straight Flute Hand Tap M6-1.00 Plug 3 Flutes UNC
Metric M6×1.00 STI tap cuts internal threads for helical inserts using three-flute high-speed steel
- TypeHole, Drill, Bore & Wire Gauges
- M6 x 1.00 metric coarse thread cuts clean internal threads
- Plug chamfer starts easily for through-hole and blind-hole tapping
- Three straight flutes evacuate chips efficiently in general-purpose use
- High-speed steel construction resists wear for longer tool life
- 06 mm overall length with 28.58 mm thread reach suits standard applications
M6-1.00 thread repair tap
The Helicoil 4687-6 is a straight flute hand tap designed for creating internal threads in screw thread insert applications. It suits mechanics and technicians who install Helicoil inserts to repair damaged or stripped M6 metric coarse threads in automotive and general engineering tasks.
High speed steel with plug chamfer
Bright uncoated high speed steel provides durability for general purpose tapping in steel, aluminium and cast iron. The plug chamfer with three flutes offers a balanced start for through holes and blind holes where chip clearance is adequate, while the right hand cut matches standard thread direction.
H2 thread limit for STI fit
Manufactured to an H2 thread limit, this tap produces the oversize pitch diameter required for Helicoil screw thread inserts, ensuring the installed insert meets the correct M6-1.00 nominal size. Using a standard tap instead would create threads too small for the insert to seat properly.
Highlights
- M6 x 1.00 metric coarse thread cuts clean internal threads
- Plug chamfer starts easily for through-hole and blind-hole tapping
- Three straight flutes evacuate chips efficiently in general-purpose use
- High-speed steel construction resists wear for longer tool life
- 06 mm overall length with 28.58 mm thread reach suits standard applications
Specifications
| Brand | Helicoil |
|---|---|
| Type | Hole, Drill, Bore & Wire Gauges |
Questions about this item
What thread standard and pitch does the M6-1.00 tap cut?
It cuts a metric coarse M6 thread with a 1.00 mm pitch, conforming to the UNC STI standard for screw thread inserts.
What are the overall length and thread length of this tap?
The overall length is 69.06 mm and the thread length is 28.58 mm, so the tap needs that much clear depth in the hole.
How do you start the tap correctly in the hole?
Use the plug chamfer to align the tap straight, then turn with steady pressure; the common mistake is forcing it off-centre and stripping the first threads.
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