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Straight flute hand tap, 5/8"-11 UNC taper, bright high-speed steel, 3.81 in overall length

Cleveland

Cleveland 54779 Straight Flute Hand Tap 5/8"-11 Taper

SKU CH-W7PH-H1SPJ

Straight flute hand tap cuts 5/8"-11 UNC threads with a taper lead in high-speed steel

  • Product typeTaps
  • Cuts precise UNC threads with 5/8"-11 taper design
  • High-speed steel construction resists wear during repeated hand tapping
  • 81 in overall length provides leverage for controlled threading
  • 81 in thread length matches standard hole depths
  • Bright uncoated finish allows visual inspection of cutting edges

Cleveland 54779 Straight Flute Hand Tap

The Cleveland 54779 is a straight flute hand tap designed for cutting internal UNC threads in a variety of materials. It suits maintenance technicians and metalworkers who need to create or repair 5/8"-11 threads by hand. The bright high-speed steel construction provides durability for general-purpose threading tasks.

Taper chamfer and UNC thread limits

This tap features a taper chamfer with a 75 percent thread drill size of 13.60 mm, requiring a precisely drilled hole for proper engagement. The thread limit is H3 with a Class of Fit 2B, defining the tolerance range for the finished thread. The thread length is 1.81 in within an overall length of 3.81 in, limiting the depth of cut in a single pass. Through-holes or deep blind holes may need additional bottoming taps.

5/8"-11 UNC thread specification

The defining specification is the 5/8"-11 UNC thread size, which determines compatibility with matching fasteners and pre-drilled holes. Select this tap only when the application calls for this exact coarse-pitch diameter and thread count. It will not produce threads for fine-pitch, metric, or other UNC sizes.

How it compares

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

Price $30.99
Typical for this category: the median of 5,493 items is $27.99.

Specifications

Product
Brand nameCLEVELAND
Product typeTaps

Questions about this item

Which tap should I choose for a 5/8"-11 thread?

This C54779 straight-flute hand tap is sized 5/8"-11 UNC with a taper chamfer, H3 limit and 2B class of fit for standard through-hole threading.

What does the 1.81 in thread length mean when I use the tap?

The cutting portion extends 1.81 in along the 3.81 in overall length, giving that much engaged thread depth in each pass.

What does the 13.60 mm drill size cap in practice?

It specifies the 75 % thread drill diameter; drilling to 13.60 mm before tapping produces the correct 5/8"-11 UNC thread profile.

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