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Cleveland spiral point tap 7/16-20 UNF H3 high speed steel TiCN coated 3 flutes

Cleveland

Cleveland C55392 Spiral Point Tap 7/16-20 UNF H3

SKU CH-D1PM-PKQ0T

Spiral point tap cuts 7/16-20 UNF threads in high-speed steel with TiCN coating

  • Precision threading in unified fine sizes
  • High-speed steel with TiCN coating resists wear
  • Spiral-point design pushes chips ahead of the tap
  • Three-flute geometry balances strength and chip clearance
  • H3 limit fits class 2B holes per spec

Cleveland C55392 Spiral Point Tap

The Cleveland C55392 is a spiral point tap designed for creating 7/16-20 UNF threads in through-hole applications. It suits machinists and maintenance technicians who need reliable thread cutting in steel and similar materials. The plug chamfer allows easier starting and alignment during hand or machine tapping operations.

High-speed steel body with TiCN coating

High-speed steel construction provides the hardness and wear resistance required for repeatable thread production. The TiCN coating further reduces friction and extends tool life when cutting ferrous alloys. A right-hand thread direction and three-flute design promote efficient chip evacuation ahead of the tap, reducing the risk of flute clogging and thread damage.

UNF thread standard with H3 limit

The tap conforms to the Unified National Fine standard with a class 2B fit and H3 thread limit, controlling the pitch diameter tolerance for consistent assembly. It requires a 9.95 mm drill size to achieve approximately 75 percent thread engagement. The overall length of 3 5/32 inches and thread length of 1 7/16 inches define the maximum reach for deep-hole tapping.

How it compares

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

Price $22.99
Cheaper than about 58% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameCLEVELAND

Questions about this item

What thread standard does the 7/16-20 UNF tap follow?

It follows the Unified National Fine standard with a 2B class of fit and H3 thread limit.

What drill size is required for a 75 percent thread?

The recommended drill size is 9.95 mm for 75 percent thread engagement.

How do you start the tap correctly in the hole?

Align the tap squarely, apply steady pressure while turning clockwise, and use cutting fluid to prevent binding.

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