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Cleveland C57023 spiral point tap #1-72 UNF HSS bright finish two flutes

Cleveland

Cleveland C57023 Spiral Point Tap #1-72 UNF HSS 2 Flute

SKU CH-ZFA9-4P7SA

A spiral point tap cuts #1-72 UNF threads in through-holes using two-flute high-speed steel

  • Product typeTaps
  • #1-72 UNF thread for fine-pitch fastening
  • Spiral point pushes chips ahead for through-holes
  • High-speed steel construction resists wear in steel
  • Two-flute design balances chip space and strength
  • Bright uncoated finish suits general-purpose tapping

Cleveland #1-72 UNF Spiral Point Tap

This Cleveland C57023 spiral point tap cuts #1-72 UNF threads in through-holes or deep blind holes. The high-speed steel construction with a bright uncoated finish suits general-purpose threading in steel and non-ferrous metals. Two flutes and a plug chamfer push chips ahead of the cut for smoother entry and reduced torque. It is made for machinists and maintenance technicians producing Class 2B internal threads.

Suited for right-hand UNF threads in through-holes

The H1 thread limit and 75 percent thread depth match standard Class 2B fit requirements for unified fine threads. Builders needing left-hand threads, metric pitches, or coated tooling for high-temperature alloys should look elsewhere. The fixed #1-72 size also means it cannot serve larger or smaller diameters, and the uncoated surface offers no wear resistance for abrasive materials.

Verify drill size #53 and 3/8 in thread length

Before ordering, confirm your workpiece material and hole depth suit a 1 11/16 in overall length tap with a 3/8 in thread length. The required tap drill is #53 to achieve the specified 75 percent thread engagement. Ensure your holder or tapping head accommodates the shank and that the machine spindle runs in the correct right-hand direction.

How it compares

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

Price $13.99
Cheaper than about 80% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameCLEVELAND
Product typeTaps

Questions about this item

What size drill bit do I need to prepare a hole for the #1-72 UNF tap?

Use a #53 drill bit to create a 75 percent thread before tapping with the #1-72 UNF spiral point tap.

Will this HSS tap cut threads in an existing mild steel workpiece?

Yes, the high speed steel construction with two flutes is designed for threading mild steel and similar materials.

How can I verify the thread limit after tapping a hole?

Check the finished threads with a Class 2B go/no-go gauge to confirm the H1 thread limit is met.

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