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Cleveland straight flute hand tap 7/8-14 plug HSS bright finish

Cleveland

Cleveland C54891 Straight Flute Hand Tap 7/8"-14 Plug pneumatic accessory

SKU CH-EF2S-1SDGC

Straight-flute hand tap cuts 7/8"-14 UNF threads in a plug configuration for 75 percent thread engagement

  • Product typeTaps
  • Straight flute design clears chips efficiently in through-holes
  • 7/8"-14 UNF thread size fits standard fine-pitch fasteners
  • Plug chamfer starts threads easily in existing holes
  • High-speed steel construction resists wear during repeated use
  • Bright uncoated finish suits general-purpose tapping applications

Cleveland C54891 Straight Flute Hand Tap

The Cleveland C54891 is a straight flute hand tap designed for creating internal threads. It is made from high speed steel with a bright uncoated finish. This tool suits machinists and maintenance technicians who need to cut precise UNF threads in a variety of materials.

Suited for right-hand UNF threading in through

This tap suits users cutting 7/8"-14 UNF threads with a 2B class of fit and H4 thread limit. It is not for left-hand thread applications. It is also not for users who require a coated tool for extended life in abrasive or high-temperature alloys.

7/8"-14 UNF thread size with plug chamfer

The defining specification is the 7/8"-14 UNF thread size combined with a plug chamfer style. This determines the thread profile and starting capability for the workpiece. The high speed steel construction and H4 limit support accurate 2B class fit results.

How it compares

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

Price $57.99
Pricier than about 71% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameCLEVELAND
Product typeTaps

Questions about this item

What tap wrench size fits the 4 11/16 in overall length of this 7/8"-14 Cleveland C54891 tap?

A standard 7/8 in tap wrench with square-drive jaws matches the shank; the 4 11/16 in length gives ample leverage for hand threading.

How do I start the plug tap straight so the first threads don't cross-thread?

Use the 20.40 mm drill hole, apply cutting oil, and turn the tap one full turn forward then a quarter turn back to clear chips every few rotations.

When does the H4 thread limit on this high-speed steel tap require replacement?

Replace it when the 2 7/32 in thread length no longer cuts a clean 2B-class UNF thread or when flank wear causes oversize pitch diameter.

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