01 — Essential Specifications
Choose with confidence
Essential specifications
The facts that matter most when choosing the right product in this family.
02 -- Materials, Applications & Machines
Working compatibility
Materials, applications & machines
Quickly confirm what the tool can cut, the work it is designed to perform, and the equipment it is intended to run on.
Compatible materials
Recommended workpiece materials
- Stainless steel
- Tough alloys
- Steel
Recommended applications
Typical jobs and operations
- Steel Stainless Steel Tough Alloys Through-Hole Tapping CNC Tapping Machine Shop
- Threading
Compatible machines
Equipment and operating methods
- Manual
- Tapping machine
03 -- Complete Technical Specifications
Technical data
Complete technical specifications
Open only the groups you need to confirm construction, dimensions, and operating requirements.
Construction & identification
Tool typeTap Sets
Tool subtypeSpiral-Point Taps
Detailed styleHSS · Plug
Manufacturer series321M
Series family321M
Tool materialHigh Speed Steel
Coating / finishStandard
Manufacturer part number321M-2.5X.45
Dimensions & fit
Size2.5 × 0.45
Increment1/0 in
Cutting diameter2.5x2.45
Flute / cutting length1/2
Overall length1-13/16
Pack quantity3
Cutting geometry
Flute geometrySpiral Point
Flute count2
Threading
Thread size2.5-0.45
Threads per inch0.45 TPI
Thread classD3
Tap chamfer stylePlug
04 -- Why Choose this series
Series advantage
Why choose the 321M series
321M
2-flute HSS spiral point plug tap that shears and ejects chips ahead for accurate through-hole tapping
Features supporting this advantage
- 2-flute HSS spiral point plug tap that shears and ejects chips ahead for accurate through-hole tapping
- High Speed Steel
- Standard
- Spiral Point
05 -- Compatibility & What's Included
Compatibility & contents
Confirm the fit before ordering
The systems, models, and components below come directly from the product’s normalized fit data.
What’s included
Components supplied with this product
- 3 321M metric spiral point plug tap(s)
- 2 flutes
- through-hole application
06 -- Use Notes & Technical Description
Before you use it
Use notes & technical description
Important fit, operating, and care guidance to review before putting the tool to work.
View the complete technical description
Champion 321M 2.5 x 0.45 3-Pack 2-Flute HSS Metric Spiral Point Plug Taps
321M-2.5X.45 is a Champion 321M 2.5 x 0.45 2-flute metric spiral point plug tap, commonly called a gun tap, for general-purpose through-hole machine tapping. It uses high-speed steel (HSS) and is designed to shear and eject chips ahead of the tap. It is supplied in a package of 3.
Key Benefits
- 2-flute HSS spiral point plug tap that shears and ejects chips ahead for accurate through-hole tapping
- Spiral point cutting action reduces chip buildup in through holes.
- Square shank fits the Champion XLT tapper, CNC machines and compatible handheld tap wrenches.
- The plug style is suited to through-hole work and applications with room for chips to exit.
- Made in USA Champion tooling for metric machine-shop and fabrication work.
Applications
- Through-hole tapping in steel
- General metal and machine-shop tapping
- CNC and production tapping
- Fabrication, maintenance and machine assembly
Technical Specifications
| Manufacturer part number | 321M-2.5X.45 |
|---|---|
| Product type | Champion HSS Metric Spiral Point Plug Taps |
| Thread size | 2.5 x 0.45 |
| Tap style | Spiral point / plug / gun tap |
| Flutes | 2 |
| Tool material | high-speed steel (HSS) |
| Primary application | Through-hole tapping |
| Package quantity | 3 tap(s) |
| Country of origin | Made in USA |
How to Use
Use the correct metric pre-drill for the 2.5 x 0.45 thread, secure the workpiece and keep the tap aligned with the hole. Apply suitable cutting fluid, use the correct tapping speed and feed, and allow the spiral point to eject chips through the hole. Wear eye protection and appropriate personal protective equipment.
Spiral point taps are intended primarily for through holes. Cutting tools may shatter if misused. Follow the machine and tap manufacturer's operating instructions. California Proposition 65 warning may apply.
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5
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