Helicoil
Helicoil 4687-8 M8x1.25 Straight Flute Hand Tap 4 Flutes
M8x1.25 thread tap for screw-thread inserts, 74.61 mm long with 32 mm thread length and four flutes
- TypeHole, Drill, Bore & Wire Gauges
- M8x1.25 metric coarse thread for standard hole preparation
- 61 mm overall length provides extended reach in deep bores
- 00 mm thread length ensures full engagement per pass
- Four straight flutes clear chips efficiently in through or blind holes
- High-speed steel construction resists wear during repetitive hand tapping
Thread Repair Tap M8×1.25
This Helicoil 4687-8 straight-flute hand tap cuts internal threads for screw-thread inserts in metric coarse M8×1.25 size. It is made from high-speed steel with a bright uncoated finish and right-hand thread direction. The tool suits technicians and DIY users who need to restore damaged threads in metal components.
Plug Chamfer with Four Flutes
The plug chamfer and four-flute design give a moderate lead-in for through holes and deeper blind holes. Overall length is 74.61 mm with a 32.00 mm thread length and D9 thread limit. These dimensions determine whether the tap reaches the required depth and matches the insert specification.
For Metric Coarse Insert Installation
This tap is for mechanics fitting Helicoil-style inserts into M8×1.25 holes. It is not for cutting standard fastening threads, left-hand threads, or fine-pitch sizes. Users needing bottoming taps, coated tools, or different thread limits should select another model.
Highlights
- M8x1.25 metric coarse thread for standard hole preparation
- 61 mm overall length provides extended reach in deep bores
- 00 mm thread length ensures full engagement per pass
- Four straight flutes clear chips efficiently in through or blind holes
- High-speed steel construction resists wear during repetitive hand tapping
Specifications
| Brand | Helicoil |
|---|---|
| Type | Hole, Drill, Bore & Wire Gauges |
Questions about this item
What does the M8x1.25 thread size mean for the holes I tap?
It produces metric coarse threads with an 8 mm major diameter and 1.25 mm pitch, matching standard M8 fasteners.
How does the plug chamfer affect starting the tap in a through hole?
The plug chamfer gives a moderate lead of 3–5 threads, making it easier to start straight in both through and blind holes.
What clearance do I need for the 74.61 mm overall length and 32.00 mm thread length?
Ensure the workpiece and holder allow at least 74.61 mm total reach, with 32.00 mm of cutting length engaged in the hole.
Also in this aisle
People compared these
Same shelf, same checkout — eight coins and a 30-minute rate lock.
