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Westward 1-inch NPT pipe tap, high-speed steel, TiN coated, five flutes

Westward

Westward 5TWY4 Pipe Tap 1"-11-1/2 NPT 5 Flutes

SKU CH-1SMN-47V8C

Cuts 1"-11-1/2 NPT threads in pipe with five flutes and a 75 percent thread drill size of 1.1406 in

  • Product typeHole, Drill, Bore & Wire Gauges
  • NPT threading cuts sealed pipe joints with 11 threads per inch
  • Five-flute design clears chips efficiently through 1 3/4 inch thread length
  • High-speed steel with TiN coating resists wear during repeated tapping
  • Right-hand cut matches standard pipe-fitting orientation
  • 75 percent thread engagement at 1.1406 inch drill size ensures tight fit

Westward 5TWY4 Pipe Tap

This Westward pipe tap cuts 1"-11-1/2 NPT threads in a single pass. It is built from high-speed steel with a TiN coating for extended tool life. The taper design suits general-purpose threading in pipe and conduit. It targets plumbers, maintenance technicians and metalworkers who need reliable thread creation.

Sustained threading performance

Five flutes distribute cutting forces evenly across the tool body during extended use. The high-speed steel substrate resists heat buildup when cutting deeper threads. TiN coating reduces friction and helps maintain sharpness over repeated operations. Right-hand cutting action matches standard pipe-threading requirements.

Upgrade considerations

This tap replaces worn or damaged NPT threading tools in the same size. The jump is worthwhile when existing taps produce undersize threads or require excessive torque. It suits workshops moving from carbon-steel taps to coated high-speed steel for longer intervals between resharpening. Buyers needing metric or straight-thread forms should select a different tool.

How it compares

Measured against everything we stock in Utility & Specialty Hand Tools, at today’s prices. Recalculated every night.

Price $95.99
Pricier than about 85% of the 2,474 comparable items (median $23.99).

Specifications

Product
Brand nameWestward
Product typeHole, Drill, Bore & Wire Gauges

Questions about this item

Does the 5-flute design run cooler when tapping NPT threads all day?

Five flutes spread the cutting load, reducing heat build-up during extended use on 1"-11-1/2 NPT threads.

What drill size must I already have to prepare the hole for this tap?

A 1.1406 in drill produces the recommended 75 percent thread depth for this 1"-11-1/2 NPT tap.

Will the TiN coating hold up when I chase threads on older black-iron pipe?

The TiN-coated high-speed steel resists wear when cleaning or cutting threads on existing steel pipe.

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