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Bright steel spiral-point tap with three flutes

Cleveland

Cleveland C57555 Spiral Point Tap 5/8-18 UNF 3 Flutes

SKU CH-F4ZV-GWEX5

Cuts 5/8-18 UNF threads in through-holes using a 3-flute high-speed steel design that pushes chips ahead for smooth tapping

  • Precise UNF threads from spiral-point geometry
  • High-speed steel resists wear in repeated cuts
  • Three flutes clear chips for smoother tapping
  • 5/8-18 size matches standard fine-thread holes
  • Bright finish reduces galling in steel parts

Cleveland Spiral Point Tap 5/8-18 UNF

This Cleveland C57555 spiral point tap cuts internal threads in through-holes. The plug chamfer and three-flute design push chips forward for efficient removal during machine tapping. High-speed steel construction provides wear resistance for general-purpose threading tasks.

Bright Uncoated Finish and H3 Thread Limit

The bright uncoated surface suits applications where coating buildup could affect fit. An H3 thread limit produces a Class 2B fit when used with the specified 14.50 mm drill size. These parameters determine the final thread tolerance without additional accessories.

Machinists Cutting UNF Threads in Through-Holes

Suited for professionals creating 5/8-18 UNF threads in materials compatible with high-speed steel. Not for blind-hole work where chips must be pulled upward, nor for users needing coated tooling for abrasive alloys or high-volume production runs.

How it compares

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

Price $30.99
Typical for this category: the median of 5,493 items is $27.99.

Specifications

Product
Brand nameCLEVELAND

Questions about this item

Will the high-speed steel threads on this C57555 tap need regrinding after repeated use?

High-speed steel construction resists wear, but cutting edges will dull over time and require professional regrinding to restore the original 5/8-18 UNF thread geometry and H3 limit.

What limits the number of holes I can thread continuously with this 3-flute spiral-point tap?

Chip evacuation through the three straight flutes and heat buildup in the uncoated high-speed steel body are the first constraints during sustained threading operations.

How much heat and cutting force does the bright uncoated finish generate during all-day production tapping?

The bright finish on high-speed steel creates higher friction than coated alternatives, increasing torque demand and heat in the workpiece during extended 5/8-18 UNF threading cycles.

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