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Straight flute hand tap, bright uncoated high-speed steel, 3.38 in overall length

Cleveland

Cleveland C54730 Straight Flute Hand Tap Bottoming 1/2-13 UNC H3

SKU CH-4WR6-6EA6Z

Straight-flute hand tap cuts 1/2-13 UNC threads to a 1.66 in depth with a 27/64 in drill size and H3 limit

  • Bottoming tap cuts full threads to hole depth
  • 1/2-13 UNC thread matches standard coarse-pitch fasteners
  • H3 limit gives 2B class fit for reliable assembly
  • High-speed steel resists wear in general-purpose tapping
  • 27/64 in drill size produces 75 percent thread engagement

Cleveland C54730 Threading Tool

The Cleveland C54730 is a straight flute hand tap designed for creating internal threads in through or blind holes. It targets machinists and maintenance technicians who need to cut precise 1/2 inch UNC threads using hand-operated or light machine tapping methods.

High-Speed Steel Construction and Bright Finish

The tap is manufactured from high-speed steel with a bright, uncoated surface that resists galling in ferrous and non-ferrous materials. Its 3.38 inch overall length and 1.66 inch thread length provide reach for standard hole depths while the right-hand cut orientation matches common threading requirements.

Replaces Worn or Incorrect Limit Taps

This H3 limit tap upgrades from dull or mismatched limit tools when a Class 2B fit is specified for the assembly. The jump is justified when thread gauge inspection fails on existing holes or when starting a new batch requiring the 27/64 inch drill size for 75 percent thread engagement.

Highlights

  • Bottoming tap cuts full threads to hole depth
  • 1/2-13 UNC thread matches standard coarse-pitch fasteners
  • H3 limit gives 2B class fit for reliable assembly
  • High-speed steel resists wear in general-purpose tapping
  • 27/64 in drill size produces 75 percent thread engagement

Specifications

BrandCLEVELAND

Questions about this item

What does the H3 thread limit mean for the 1/2-13 UNC tap?

The H3 limit sets the pitch-diameter tolerance for a class 2B fit on 1/2-13 UNC threads.

What hole diameter matches the 75 percent thread drill size for this tap?

Use a 27/64 inch drill to produce the recommended 75 percent thread depth before tapping.

How do you start a bottoming tap correctly in a blind hole?

Run a taper or plug tap first to start the thread, then finish to the bottom with this bottoming tap.

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