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Cleveland spiral flute tap #10-32 UNF three flutes steam oxide finish

Cleveland

Cleveland C58438 Spiral Flute Tap #10-32 UNF 3 Flutes Steam Oxide

SKU CH-PBA7-3BZ8S

Creates #10-32 UNF threads in blind holes using three spiral flutes and steam-oxide high-speed steel

  • TypeTaps
  • #10-32 UNF thread cuts cleanly in blind holes
  • Three-flute spiral design evacuates chips efficiently
  • Steam oxide coating resists wear during tapping
  • H3 limit fits 2B class threads precisely
  • High-speed steel construction handles repeated use

Thread specification

The Cleveland C58438 is a #10-32 UNF spiral flute tap designed for cutting internal threads in through-holes and blind holes. It suits maintenance technicians and machinists who need to repair or create fine-pitch threads in metal components. The right-hand thread direction matches standard fastener conventions.

Thread limit and fit

The tap is manufactured to an H3 thread limit with a Class 2B fit, providing the tolerance control required for general-purpose fastening applications. A 75 percent thread engagement is achieved when used with a #21 drill size, ensuring consistent thread depth and strength. The three-flute geometry balances chip evacuation and cutting stability.

Application requirements

The high-speed steel body with steam oxide finish resists wear during hand or machine tapping operations. A 1/2 inch thread length and 2 3/8 inch overall length allow access to moderately deep holes. The tool requires a compatible tap holder and cutting fluid for optimal performance. It does not suit left-hand thread requirements or larger thread diameters.

Highlights

  • #10-32 UNF thread cuts cleanly in blind holes
  • Three-flute spiral design evacuates chips efficiently
  • Steam oxide coating resists wear during tapping
  • H3 limit fits 2B class threads precisely
  • High-speed steel construction handles repeated use

Specifications

BrandCLEVELAND
TypeTaps

Questions about this item

What does the #10-32 UNF thread size mean when I use this tap in a machine?

It cuts a #10 diameter thread with 32 threads per inch in Unified National Fine form, right-hand direction, to a Class 2B fit with H3 limit.

How does the High Speed Steel material and steam oxide finish affect cutting performance?

High Speed Steel resists heat during threading, while the black steam oxide finish helps retain cutting fluid and reduces galling in steel and stainless workpieces.

What drill size and clearance do I need to fit this tap properly?

Use a #21 drill for the 75 percent thread engagement; the tap has 1/2 in thread length and 2 3/8 in overall length with three flutes for chip evacuation.

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