UNC Carbon

Carbon Tap Set UNC-1/4x20

Product Code: UNCCS14

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Key Features
Precision manufactured in Europe to ISO529 standards
Suitable for hand and machine operation, and are suitable for production
2N Tolerance for optimum thread fit

Technical Specifications
Brand ALPHA
Subcategory UNC Carbon
Type of Measure UNC
Diameter (in) 1/4
Drill Size (mm) 5.1
Material Carbon
OAL (mm) 66
Set/Kit Set
TPI 20
Barcode 9342386031898
Category UNC Carbon
Longest side (mm) 105.00
Median side (mm) 50.00
Shortest side (mm) 15.00
Order Quantity 1
  • Alpha Carbon Hand Taps are precision manufactured in Europe to ISO529 standards.
  • Carbon Hand Taps are general purpose taps suitable for hand and machine operation, and are suitable for production use.
  • 2N Tolerance for optimum thread fit that balances fastener performance, manufacturing, economy and convenience.
  • Suitable for use in Steel, Aluminium, Copper, Brass etc.
  • Always use lubricant. Click here for our range.

Alpha Tap Sets contain a Taper, Inter and Bottoming tap. TAPER taps have a lead of eight threads and are used as a starting tap in difficult or high precision holes. Alpha Taper taps can be identified by the single ring on the shaft near the driving square. INTERMEDIATE taps have a lead of four threads and are used in most general purpose applications. Alpha Intermediate taps can be identified by the two rings on the shaft near the driving square. BOTTOMING taps have a lead of two threads and are used when tapping blind holes. Usually preceded by a taper or intermediate tap. Alpha bottoming taps can be identified by their plain shaft, they have no rings on the shaft near the driving square.

  • Diameter: 1/4mm
  • Pitch: 20mm
  • Overall length: 50mm
  • Shaft Diameter: 6mm
  • Drive Square: 4.9mm
  • Tapping Drill Size: 5.20mm
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