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Cleveland C54598 straight flute hand tap, plug style, bright uncoated finish, 2.94 in long

Cleveland

Cleveland C54598 Straight Flute Hand Tap Plug 3/8-24 UNF 3 Flutes H3 2.94 in

SKU CH-B72N-XFK69

Cuts 3/8-24 UNF internal threads with a 1.25 in thread length and 2.94 in overall length

  • Straight-flute design clears chips in through holes
  • Plug chamfer starts threads easily in blind holes
  • 3/8-24 UNF size fits standard fine-thread fasteners
  • H3 limit produces a 2B class of fit
  • High-speed steel resists wear during hand tapping

Straight Flute Hand Tap

The Cleveland C54598 is a straight flute hand tap designed for creating UNF threads in through holes. It suits machinists and maintenance technicians who need to cut precise internal threads by hand or with a tapping head.

Plug Chamfer for General Use

The plug chamfer provides a moderate lead for starting threads in through holes. High speed steel construction delivers durability for general purpose threading in steel and non-ferrous materials. The bright uncoated finish is suitable for standard workshop conditions.

3/8-24 UNF Thread Specification

This tap cuts a 3/8 inch diameter thread with 24 threads per inch in Unified National Fine form. The H3 thread limit produces a class 2B fit when used with the correct 8.50 mm drill size for 75 percent thread engagement.

How it compares

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

Price $12.99
Cheaper than about 82% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameCLEVELAND

Questions about this item

How do I install the 3/8-24 UNF tap and which drill size should I use?

Drill the hole with an 8.50 mm bit to achieve the 75 percent thread depth, then run the straight-flute plug tap by hand using a tap wrench, keeping it perpendicular to the workpiece and reversing frequently to break chips.

What maintenance or replacement will the H3 high-speed steel tap need over time?

The bright uncoated H3 tap will dull with repeated use; resharpen the flutes when thread quality drops or replace the tap once the cutting edges can no longer produce a clean 2B class fit.

What limit appears first when tapping multiple holes in hard material?

The 1.25 in thread length and straight-flute design make chip evacuation the limiting factor in sustained use, especially in deeper or tougher workpieces where chips can pack the flutes.

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