Helicoil
Helicoil 2087-9 Straight Flute Hand Tap M9-1.25 Plug 4
Metric coarse STI tap cuts M9 × 1.25 threads in 32 mm depth, H5 limit, four-flute high-speed steel
- TypeHole, Drill, Bore & Wire Gauges
- M9 x 1.25 metric coarse thread for precise fits
- 00 mm overall length reaches deeper holes
- 00 mm thread length cuts full engagement
- High-speed steel construction resists wear in use
- Four-flute plug design clears chips efficiently
Thread Repair Tap for M9 × 1.25 Holes
This Helicoil straight-flute hand tap cuts internal threads sized M9 with a 1.25 mm pitch. It is designed for technicians who need to create or restore metric coarse threads in steel, aluminium or cast iron using a standard tap wrench. The H5 thread limit provides a standard fit for general-purpose thread-insert installations.
Replaces Worn or Undersized Taps
A new tap restores clean, accurate thread geometry when an existing tap has dulled or when a drilled hole proves slightly undersized. The plug chamfer eases entry and reduces torque, making the step worthwhile whenever thread quality affects fastener holding power or when a damaged thread would otherwise require a larger insert size.
Fits Standard Tap Wrenches and Drill Schedules
The 74.00 mm overall length and 32.00 mm thread length match common M9 tap-drill charts, so the tool works with the drill bits already in a metric tap set. Four flutes clear chips efficiently in through-holes, while the bright high-speed steel finish resists galling without requiring special lubricants or powered tapping equipment.
Highlights
- M9 x 1.25 metric coarse thread for precise fits
- 00 mm overall length reaches deeper holes
- 00 mm thread length cuts full engagement
- High-speed steel construction resists wear in use
- Four-flute plug design clears chips efficiently
Specifications
| Brand | Helicoil |
|---|---|
| Type | Hole, Drill, Bore & Wire Gauges |
Questions about this item
What tap drill size and clearance does the M9×1.25 STI tap require for a proper hole?
Drill the hole to the STI tap drill size for M9×1.25 coarse thread; the tap has a 74.00 mm overall length and 32.00 mm thread length, so ensure the workpiece or fixture provides at least that much clear depth.
How do I start the plug-chamfer tap straight, and what is the common alignment mistake?
Use a tap guide or align the tap visually with the hole axis before applying pressure; the frequent error is letting the 4-flute plug chamfer wander off-centre in the first few turns, which cuts an oversized or angled thread.
When should this H5-limit, uncoated high-speed steel tap be replaced?
Replace it when the cutting edges show visible wear, chipping, or when the thread gauge indicates the pitch diameter has grown beyond the H5 tolerance, since the bright finish offers no coating to extend life.
Also in this aisle
People compared these
Same shelf, same checkout — eight coins and a 30-minute rate lock.
