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
- Aluminum
- Steel
Recommended applications
Typical jobs and operations
- Steel Aluminum Brass Cast Metals Thread Repair Fabrication Machine Assembly Maintenance
- 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 typeTaps
Tool subtypeHand Taps
Detailed styleHSS · Plug
Manufacturer series308
Series family308
Measurement systemImperial
Tool materialHigh Speed Steel
Coating / finishStandard
Manufacturer part number308-7/8-9-P
Dimensions & fit
Size7/8-9 UNC
Drill / wire / letter designationC
Cutting diameter7/8-9
Flute / cutting length2-7/32
Overall length4-11/16
Pack quantity1
Cutting geometry
Flute count4
Threading
Thread size3087/8-9
Thread standard / formUNC
Threads per inch9.0 TPI
Thread classH4
Tap chamfer stylePlug
04 -- Why Choose this series
Series advantage
Why choose the 308 series
308
HSS hand tap with plug chamfer for general-purpose chamfer for advancing threads in through-holes and many blind-hole applications.
Features supporting this advantage
- HSS hand tap with plug chamfer for general-purpose chamfer for advancing threads in through-holes and many blind-hole applications.
- High Speed Steel
- Standard
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
- 1 plug HSS hand tap(s)
- square shank
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 308 7/8-9 Plug HSS Hand Tap
308-7/8-9-P is a Champion 308 7/8-9 plug HSS hand tap made from high-speed steel for accurate, general-purpose metal threading. This tap is supplied in a package of 1.
Key Benefits
- Industrial-quality high-speed steel for faster, more accurate tapping than carbon taps.
- General-purpose chamfer for advancing threads in through-holes and many blind-hole applications.
- Square shank fits compatible tap wrenches and production tapping heads.
- Available as a standalone chamfer style or as a matched three-piece set for the same thread size.
- Made in USA Champion tooling for thread repair, fabrication, maintenance and machine assembly.
Applications
- Steel and general metal threading
- Thread repair and maintenance
- Machine assembly and fabrication
- Through-holes and blind holes, using the correct chamfer style
Chamfer Selection
Plug: General-purpose chamfer for advancing threads in through-holes and many blind-hole applications.
Technical Specifications
| Manufacturer part number | 308-7/8-9-P |
|---|---|
| Product type | Champion 308 HSS hand tap |
| Thread size | 7/8-9 |
| Chamfer style | Plug |
| Material | High-speed steel (HSS) |
| Shank | Square shank |
| Included components | 1 plug HSS hand tap(s); square shank |
| Package quantity | 1 |
| Country of origin | Made in USA |
How to Use
Secure the workpiece, select the correct drill size and keep the tap aligned with the hole. Use suitable cutting fluid, turn the tap steadily and clear chips regularly. Start with a taper or plug tap before using a bottoming tap in a blind hole.
Cutting tools may shatter if misused. Secure the workpiece, avoid excessive force and follow safe tapping procedures. Wear eye protection and appropriate personal protective equipment. California Proposition 65 warning may apply.
How ordering works
A clear process from order to delivery
Whether you need one replacement tool or a recurring supply order, every step is designed for clear communication, accurate fulfillment and dependable delivery.
1
Order submitted securely
Your products, quantities and order details enter our system for verification.
Secure submission
2
Confirmation sent
You receive a clear summary of the items and quantities, ready to review or share.
Details confirmed
3
Picking and packing
Our team prepares the correct products and quantities for safe, accurate transportation.
Carefully prepared
4
Tracking provided
As soon as the carrier label is created, the tracking information is sent to you.
Trackable shipment
5
Delivery to your location
Your order travels to the selected address with clear visibility into its progress.
Dependable delivery
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