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Cleveland C55334 spiral point tap plug 1/2-20 UNF HSS TiN 3 flutes

Cleveland

Cleveland C55334 Spiral Point Tap Plug 1/2-20 UNF 3 Flutes HSS TiN

SKU CH-S02T-9QFHR

A 1/2-20 UNF spiral-point tap in high-speed steel with TiN coating and three flutes for through-hole threading

  • Cuts threads faster with spiral-point design
  • Creates precise UNF threads at 1/2-20 pitch
  • Three flutes clear chips efficiently during tapping
  • TiN coating on HSS extends cutting life
  • Right-hand 2B class fit meets standard specs

Cleveland C55334 Spiral Point Tap

This CLEVELAND C55334 spiral point tap creates unified fine threads in a 1/2-20 UNF size. It is manufactured from high speed steel with a TiN coating for wear resistance. The plug chamfer suits through-hole tapping in general machine shop and maintenance work. Three flutes provide chip evacuation ahead of the cutting edges.

For machinists cutting 1/2-20 UNF threads

This tap suits operators who need a right-hand H3 limit tool for class 2B fit in through holes. It is not for blind-hole work where chips must be pulled upward. Buyers needing a different thread limit, a left-hand thread or a bottoming chamfer should select another tool. The 11.40 mm drill size is specific to the 75 percent thread engagement.

H3 thread limit for class 2B fit

The H3 limit determines the pitch diameter tolerance that produces a class 2B internal thread. Selecting the wrong limit creates oversize or undersize threads that fail gauging. Verify the required limit against the engineering drawing before ordering. The 1 21/32 in thread length and 3 3/8 in overall length follow from the standard blank for this size.

How it compares

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

Price $19.99
Cheaper than about 64% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameCLEVELAND

Questions about this item

What size drill bit do I need to prepare the hole for the 1/2-20 UNF tap?

Use an 11.40 mm drill bit to create the 75 percent thread engagement the tap requires.

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

Yes, the H3 thread limit is designed for a Class 2B fit, so it will pass a standard 2B go/no-go gauge.

How can I confirm the tap is cutting correctly after I start threading?

Check that chips flow forward out of the hole and that the finished threads accept a 1/2-20 UNF 2B go gauge without binding.

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