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Cleveland spiral point tap, cobalt black oxide finish, three flutes

Cleveland

Cleveland C27708 Spiral Point Tap 1/2-13 UNC 3 Flute

SKU CH-H1V4-XJVBV

A cobalt spiral-point tap cuts 1/2-13 UNC threads with three flutes and a 15/16 in thread length

  • Cuts clean threads in through-holes with spiral-point design
  • Cobalt construction with black oxide resists wear in tough materials
  • Three flutes evacuate chips efficiently for smoother tapping
  • H3 limit and 2B fit deliver precise 1/2-13 UNC threads
  • 75 % thread drill size .4219 in simplifies hole preparation

Cleveland Spiral Point Tap

The Cleveland C27708 is a spiral point tap designed for creating unified coarse threads in metal. It suits machinists and maintenance teams who need reliable internal threading for 1/2-13 UNC fasteners.

General-purpose threading in steel

This tap works well for through-hole jobs in carbon and alloy steels where chip evacuation ahead of the cut is preferred. It is not suited for blind holes, left-hand threads, or materials that require a bottoming or forming tap.

1/2-13 UNC with H3 limits

The 3-flute cobalt body with black oxide coating handles 1/2-13 UNC threads to a 2B class of fit using a .4219 drill size. Thread length is 15/16 in within an overall length of 3 3/8 in, so deeper holes will need a longer tool.

How it compares

Measured against everything we stock in Bits, Hole Saws & Accessory Kits, at today’s prices. Recalculated every night.

Price $24.99
Cheaper than about 55% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameCLEVELAND

Questions about this item

What drill bit size do I need to prepare a hole for the 1/2-13 UNC tap?

Use a 0.4219 in drill bit to achieve the 75 percent thread depth required before tapping.

Will this H3 limit tap fit a standard 2B internal thread gauge?

Yes, the H3 thread limit is designed to produce a Class 2B fit when used correctly.

How can I confirm the tap is cutting properly after starting the hole?

The spiral point should push chips forward out of the hole, and the 15/16 in thread length will be fully formed when the tap reaches depth.

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