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UNC Carbon

Carbon Tap UNC Bottoming-5/16x18

Product Code: UNCCB516

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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
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Technical Specifications
Brand ALPHA
Subcategory UNC Carbon
Type of Measure UNC
Diameter (in) 5/16
Drill Size (mm) 6.6
Head Type Bottoming
Material Carbon
OAL (mm) 72
TPI 18
Barcode 9342386031720
Category UNC Carbon
Longest side (mm) 90.00
Median side (mm) 15.00
Shortest side (mm) 10.00
Weight (gr) 25.00
Carton Quantity 1.00
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.

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: 5/16mm
  • Pitch: 18mm
  • Overall length: 53mm
  • Shaft Diameter: 6mm
  • Drive Square: 4.9mm
  • Tapping Drill Size: 6.60mm
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