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Cleveland C55224 straight flute hand tap, silver steel finish, four flutes, bottoming chamfer

Cleveland

Cleveland C55224 Straight Flute Hand Tap 3/8-16 UNC Bottoming 4 Flutes

SKU CH-Y3G2-B8BXN

Straight flute hand tap cuts 3/8-16 UNC threads in a bottoming hole using four flutes and high-speed steel with TiN coating

  • Product typeTaps
  • Bottoming tap cuts threads to the hole bottom
  • Straight flute design suits through and blind holes
  • High-speed steel with TiN coating resists wear
  • 3/8-16 UNC size matches standard coarse threads
  • Four flutes provide smooth chip evacuation

Thread-cutting tap for UNC holes

The Cleveland C55224 is a straight-flute hand tap designed to cut 3/8"-16 UNC threads in metal components. It suits maintenance technicians, machinists and workshop users who need to create new internal threads or repair damaged ones using hand or powered tools.

Bottoming chamfer reaches full depth

The bottoming style provides a short lead that allows threading close to the base of a blind hole. Four flutes and an H3 thread limit produce a class 2B fit, while the high-speed steel body with TiN coating resists wear during repeated use.

Simple hand operation with standard drill prep

Turn the tap with a suitable wrench after drilling a 5/16 inch hole for 75 percent thread engagement. Apply cutting fluid to prevent chip binding; the straight flutes do not evacuate chips automatically, so back the tap out regularly to clear swarf.

How it compares

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

Price $11.99
Cheaper than about 84% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameCLEVELAND
Product typeTaps

Questions about this item

What does the 3/8-16 UNC size mean when I am tapping a hole?

It cuts a 3/8 inch diameter thread with 16 threads per inch in the Unified National Coarse standard, producing a class 2B fit for general-purpose fastening.

How does the H3 thread limit affect the finished thread?

The H3 limit places the pitch diameter slightly above basic size, giving a tighter 2B class of fit that suits most production and repair work.

What drill size and clearance do I need for this bottoming tap?

Use a 5/16 inch drill for 75 percent thread engagement; the tap has a 3/4 inch thread length and 2 15/16 inch overall length, so the hole must accommodate that depth.

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