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Cleveland straight flute hand tap, bright high-speed steel, 3/8"-16 UNC

Cleveland

Cleveland C54581 Straight Flute Hand Tap 3/8"-16 UNC pneumatic accessory

SKU CH-NH8P-A28KM

Straight flute hand tap cuts 3/8"-16 UNC threads in through-holes, made from high-speed steel with a bright finish and 1.25 inch thread length

  • TypeDrill Bits
  • Straight flute design cuts clean 3/8"-16 UNC threads
  • High-speed steel construction resists wear during hand tapping
  • 25 in thread length matches standard depth requirements
  • 94 in overall length provides secure grip and control
  • Bright uncoated finish reduces friction for smoother cutting

Straight Flute Hand Tap 3/8"-16 UNC

This Cleveland C54581 straight flute hand tap cuts internal threads in a 3/8"-16 UNC size. It is made from high speed steel with a bright uncoated finish for general purpose threading work. The right hand thread design suits standard fastening applications.

Thread Size 3/8"-16 UNC Limits

The tap conforms to a class 2B fit with an H2 thread limit for standard tolerance requirements. A 75 percent thread drill size of 5/16 in is specified for the pilot hole before tapping. Bottoming chamfer style allows threading close to the bottom of a blind hole.

Capacity and Headroom for Threading Tasks

Overall length measures 2.94 in with a thread length of 1.25 in providing reach for typical through or blind holes. The straight flute design clears chips adequately in softer materials but may load up in deep or high volume production runs. Users needing coated performance or spiral point chip ejection should select a different tap style.

Highlights

  • Straight flute design cuts clean 3/8"-16 UNC threads
  • High-speed steel construction resists wear during hand tapping
  • 25 in thread length matches standard depth requirements
  • 94 in overall length provides secure grip and control
  • Bright uncoated finish reduces friction for smoother cutting

Specifications

BrandCLEVELAND
TypeDrill Bits

Questions about this item

Is the 3/8"-16 UNC size the right tap for my threading job?

Choose the 3/8"-16 UNC tap when you need to cut coarse internal threads of that exact diameter and pitch; the H2 limit and 2B class of fit suit general-purpose work.

What does the 1.25 inch thread length mean when I am tapping a hole?

The 1.25 inch thread length is the cutting portion of the tap; it determines the maximum depth of full-form threads you can produce in a single pass.

How does the straight-flute design affect chip removal in a through hole?

Straight flutes push chips ahead of the tap, so they work best in through holes or with frequent reversal to clear chips in blind holes.

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