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Cleveland straight flute hand tap, gold TiN coated high speed steel, 5.13 inch overall length

Cleveland

Cleveland C55252 Straight Flute Hand Tap 1"-8 UNC Bottoming HSS TiN

SKU CH-KCAG-7Q4FQ

Straight flute hand tap cuts 1"-8 UNC threads to a 2.5 inch depth in a 5.13 inch overall length

  • Product typeTaps
  • Bottoming design cuts full threads to the hole floor
  • High-speed steel with TiN coating resists wear during tapping
  • 13 in overall length reaches deep internal threads
  • 1"-8 UNC thread size matches standard coarse fasteners
  • 75 % thread drill size 22.25 mm guides accurate pilot holes

1"-8 UNC Bottoming Tap

The Cleveland C55252 is a straight-flute hand tap cut for 1 inch minus 8 UNC threads. It is made from high-speed steel with a titanium nitride coating for wear resistance. The bottoming chamfer lets it cut threads close to the bottom of a blind hole. Machinists and maintenance technicians use it for final thread sizing in steel and iron workpieces.

Through-hole and blind-hole use

The 5.13 inch overall length and 2.5 inch thread length reach standard depths without an extension. A 22.25 mm drill produces the recommended 75 percent thread engagement for a class 2B fit. The H4 thread limit provides a standard allowance for general-purpose threading. Right-hand cutting direction matches conventional tap handles and CNC toolholders.

Sustained cutting in tough materials

High-speed steel substrate and TiN coating maintain edge life during repeated hand or low-speed machine tapping. The straight-flute design clears chips adequately in short-chipping materials but can pack in deep, ductile cuts. Bottoming geometry requires the hole to be drilled deep enough for the full thread length plus chip clearance. It is not suited for high-volume production tapping where spiral-point or spiral-flute tools evacuate chips faster.

How it compares

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

Price $89.99
Pricier than about 81% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameCLEVELAND
Product typeTaps

Questions about this item

What thread limit does the Cleveland C55252 tap use for the 1"-8 UNC size?

The tap is made to an H4 thread limit for a 2B class of fit on 1"-8 UNC threads.

How much heat builds up in the high-speed steel body during extended hand tapping?

High-speed steel with TiN coating reduces friction, so the tap stays cooler during repeated bottoming passes in steel or iron.

Which tap wrench size fits the 5.13-inch overall length and square shank?

A wrench that accepts the standard square on a 1-inch hand tap will engage the shank securely for the full 5.13-inch length.

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