Helicoil
Helicoil 4687-2.5 Straight Flute Hand Tap Plug M2.5x0.45 3 Flutes hand tool
A straight-flute hand tap for M2.5x0.45 threads, 49.00 mm overall with a 15.00 mm thread length, three flutes and plug chamfer in high-speed steel
- TypeHole, Drill, Bore & Wire Gauges
- M2.5 x 0.45 metric coarse thread cuts clean internal threads
- High-speed steel construction resists wear during repeated hand-tapping operations
- 00 mm overall length provides reach for deeper holes
- 00 mm thread length engages fully for accurate thread depth
- Three-flute plug chamfer starts easily and clears chips efficiently
Thread Repair Tap M2.5
This straight flute hand tap creates clean threads for Helicoil screw-thread inserts in metric coarse M2.5 x 0.45 holes. It is intended for technicians and engineers who need to restore damaged threads in softer materials such as aluminium or mild steel.
High Speed Steel Bright Finish
The tap is manufactured from high speed steel with an uncoated bright surface and a right hand cutting direction. Three flutes and a plug chamfer provide balanced chip evacuation for through holes and blind holes with adequate depth. Overall length is 49.00 mm with a 15.00 mm thread length.
Check Hole Size And Material Compatibility
Verify that the drilled hole matches the required tap drill diameter for M2.5 x 0.45 STI threads before ordering. The D1 thread limit and uncoated finish are optimised for ductile metals; harder alloys or abrasive composites may require a coated or alternative tap design.
Highlights
- M2.5 x 0.45 metric coarse thread cuts clean internal threads
- High-speed steel construction resists wear during repeated hand-tapping operations
- 00 mm overall length provides reach for deeper holes
- 00 mm thread length engages fully for accurate thread depth
- Three-flute plug chamfer starts easily and clears chips efficiently
Specifications
| Brand | Helicoil |
|---|---|
| Type | Hole, Drill, Bore & Wire Gauges |
Questions about this item
What thread standard does the M2.5x0.45 tap follow, and what pitch does that limit?
The tap follows the metric coarse standard with a 0.45 mm pitch, which fixes the thread spacing for M2.5 holes.
What overall length and thread length must the workpiece accommodate for this tap?
The tap measures 49.00 mm overall with a 15.00 mm thread length, so the hole depth and clearance must allow at least that engagement.
How is the plug-chamfer tap started correctly, and what common error damages threads?
Apply steady axial pressure while turning the right-hand tap clockwise; forcing it off-centre or reversing too early cross-threads the hole.
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