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Cleveland C55687 pipe tap, 1"-11.5 NPTF, semi-bottoming, 5 flutes, HSS TiN finish

Cleveland

Cleveland C55687 Pipe Tap 1"-11.5 NPTF Semi-Bottoming 5 Flutes HSS TiN

SKU CH-GD30-A8EPV

Cuts 1"-11.5 NPTF pipe threads in a semi-bottoming design using five-flute high-speed steel with TiN coating

  • Product typeTaps
  • 1"-11.5 NPTF threads for precise pipe sealing
  • Semi-bottoming design cuts cleanly in blind holes
  • Five-flute geometry clears chips for smoother cutting
  • High-speed steel with TiN coating resists wear
  • 75 % thread drill size 1.1406 in guides accurate tapping

Cleveland C55687 Pipe Tap 1"-11.5 NPTF

The Cleveland C55687 is a high-speed steel pipe tap with a TiN coating designed for creating NPTF threads. It features a 1 inch by 11.5 thread size and a semi-bottoming chamfer with five flutes for efficient chip evacuation. This tool suits maintenance technicians and pipefitters who need reliable internal threading in conduit and pipe systems.

Verify drill size and thread standard before use

Check that your workpiece material is compatible with high-speed steel cutting tools and that you have a 1.1406 inch drill available for the 75 percent thread depth. Confirm the application requires NPTF dryseal threads rather than standard NPT, as the taper and crest profiles differ. Ensure your tapping equipment can accommodate the 3 3/4 inch overall length and 1 3/4 inch thread length.

Requires compatible holder

The tap’s square shank fits standard tap wrenches or machine holders for right-hand rotation. The TiN coating reduces friction and extends tool life when cutting ferrous metals with appropriate cutting fluid. Its five-flute design distributes cutting load evenly, freeing the operator from excessive torque while producing clean threads in a single pass.

How it compares

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

Price $121.99
Pricier than about 87% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameCLEVELAND
Product typeTaps

Questions about this item

Does the Cleveland C55687 pipe tap come with the 1.1406 in drill bit or must I buy it separately?

Only the tap is supplied; the 75 percent thread drill size of 1.1406 in is a reference dimension you source yourself.

When should I choose this 1"-11.5 NPTF semi-bottoming tap over other thread forms?

Select it when cutting dry-seal National Pipe Taper Fuel threads in a through or blind hole where a semi-bottoming chamfer and five-flute HSS TiN construction are specified.

What does the 11.5 threads-per-inch figure mean once the tap is in the machine?

It sets the pitch so each revolution advances the tap 1/11.5 in, producing the standard NPTF taper profile at the rated 75 percent thread depth.

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