Greenfield Threading
Greenfield Threading 328208 Straight Flute Hand Tap M3x0.5 Bottoming
Creates M3x0.5 metric coarse threads with a 49.28 mm high-speed steel bottoming tap featuring 7.87 mm thread length and D3 limit
- M3x0.5 metric coarse thread fits standard holes
- Bottoming chamfer cuts threads to the bottom of blind holes
- 28 mm overall length reaches deep work areas
- High-speed steel construction resists wear during repeated use
- Bright uncoated finish suits general-purpose tapping tasks
Thread size M3 x 0.5 metric coarse
This Greenfield Threading straight flute hand tap cuts internal threads in through-holes and blind holes. It suits maintenance engineers and workshop technicians who need to create or repair M3 metric coarse threads. The bottoming chamfer lets the tap start close to the bottom of a blind hole.
Bright uncoated high-speed steel construction
The bright finish provides no coating layer, so the cutting edges stay sharp for general-purpose tapping in steel and non-ferrous metals. A 75 percent thread drill size of 2.50 mm is specified for the pilot hole. The D3 thread limit targets a 6H class of fit for standard assemblies.
Right-hand cutting with 7.87 mm thread length
The tap measures 49.28 mm overall with a 7.87 mm thread length and cuts on clockwise rotation. Users must match the 2.50 mm drill size exactly and use cutting fluid to avoid tap breakage. It is not suited for left-hand threads or powered tapping heads without a tapping attachment.
Highlights
- M3x0.5 metric coarse thread fits standard holes
- Bottoming chamfer cuts threads to the bottom of blind holes
- 28 mm overall length reaches deep work areas
- High-speed steel construction resists wear during repeated use
- Bright uncoated finish suits general-purpose tapping tasks
Specifications
| Brand | CHICAGO-LATROBE |
|---|
Questions about this item
When will the M3x0.5 tap need replacing?
Replace the tap when the cutting edges dull enough to produce oversize threads or require excessive torque; lifespan depends on material hardness and hole volume, not a fixed interval.
What limits continuous threading with this 49.28 mm tap?
Chip packing in the 7.87 mm thread length is the first limit; frequent reversal to clear chips prevents binding and breakage in deep holes.
How much heat builds up during all-day hand tapping?
Heat stays low with hand operation; use cutting fluid to reduce friction at the 2.50 mm drill size and keep the high-speed steel from tempering.
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