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Straight-flute hand tap 7/8-9 UNC bottoming 4 flutes HSS bright finish

Cleveland

Cleveland C54886 Straight Flute Hand Tap 7/8"-9 Bottoming 4 Flutes UNC pneumatic accessory

SKU CH-1QYQ-AJJDJ

Creates precise UNC threads in 7/8"-9 holes using a four-flute, bottoming straight-flute tap made from high-speed steel

  • Product typeTaps
  • Straight-flute design clears chips in through-holes
  • 7/8"-9 UNC thread cuts standard coarse fasteners
  • Bottoming chamfer reaches full depth in blind holes
  • Four flutes give smooth cutting and longer life
  • High-speed steel resists wear in general-purpose tapping

Cleveland C54886 Tap for UNC Threads

The Cleveland C54886 is a straight-flute hand tap designed to cut unified national coarse threads in a single pass. It suits maintenance technicians and machinists who need to create internal threads in through-holes or blind holes using hand or powered tapping heads.

Bottoming Chamfer Limits Thread Depth

A bottoming chamfer of two to three threads means the tap cannot start a thread from the top of a blind hole. It requires a pre-drilled hole and a taper or plug tap to begin the thread before this tool finishes to the bottom.

H4 Limit Handles 75 Percent Thread Class 2B

The H4 thread limit and 75 percent thread drill size of 19.50 mm provide the correct pitch diameter for a class 2B fit. High-speed steel construction resists wear in general-purpose steel and non-ferrous alloys, but the uncoated bright finish offers no lubricity or heat resistance for difficult materials.

How it compares

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

Price $58.99
Pricier than about 71% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameCLEVELAND
Product typeTaps

Questions about this item

Which Cleveland tap model matches a 7/8"-9 UNC bottoming thread?

The C54886 is the straight-flute hand tap specified for 7/8"-9 UNC bottoming work with four flutes and an H4 thread limit.

What does the 4 11/16 in overall length mean when the tap is in the chuck?

The tap measures 4 11/16 in from end to end, giving 2 7/32 in of cutting thread length before the shank engages the holder.

How does the H4 thread limit and 2B class of fit affect the finished hole?

H4 places the pitch diameter slightly above basic size, producing a 2B class fit when used with the 19.50 mm drill for 75 percent thread engagement.

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