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Westward 1 inch NPT pipe tap, bright finish, five flutes

Westward

Westward 5TWU2 Pipe Tap 1"-11-1/2 Semi-Bottoming 5 Flutes NPT

SKU CH-0FJM-ZM533

Cuts 1"-11-1/2 NPT threads with five flutes in a semi-bottoming high-speed steel tap

  • Product typeHole, Drill, Bore & Wire Gauges
  • Cuts 1"-11-1/2 NPT threads with semi-bottoming design
  • Five flutes clear chips efficiently during threading
  • High-speed steel construction resists wear in tough materials
  • 75 percent thread drill size 1.1406 in ensures proper fit
  • Right-hand bright finish tap threads pipe and conduit

Westward NPT Pipe Tap

The Westward 5TWU2 is a high-speed steel pipe tap for cutting National Pipe Taper threads in metal. It suits plumbers, pipefitters and maintenance technicians who need to create threaded connections in pipe and conduit. The bright uncoated finish is standard for general-purpose tapping. Buyers who need taps for straight threads or different thread standards cannot use this tool.

Semi-Bottoming 5-Flute Installation

The semi-bottoming chamfer and five-flute design help start threads cleanly and evacuate chips during hand or machine tapping. Right-hand cutting direction follows standard practice. Common issues include tap breakage from misalignment, insufficient lubrication or forcing the tool through hard material without clearing chips. Using the correct drill size and steady pressure reduces these risks.

NPT Standard Practical Limits

This tap produces a 1-inch nominal thread with an 11 threads-per-inch pitch and Class 3B fit. The 75 percent thread depth requires a 1.1406 inch drill size for proper engagement. NPT threads rely on taper interference for sealing so they are not suited for applications needing straight mechanical threads or repeated assembly without sealant. The fixed geometry limits use to this specific thread form only.

How it compares

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

Price $54.99
Pricier than about 75% of the 2,474 comparable items (median $23.99).

Specifications

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

Questions about this item

How can I confirm the 1"-11-1/2 NPT threads are cut correctly after using the tap?

Check that the thread gauge reads 11 threads per inch and that a 3B class ring gauge fits the full 1 3/4 inch thread length.

Does the package include the 1.1406 inch drill bit for the 75 percent thread depth, or must I buy it separately?

The tap is sold alone; the 1.1406 inch drill bit for 75 percent thread depth must be purchased separately.

When should I choose this 5-flute semi-bottoming NPT tap over other Westward thread taps?

Select this tap when you need a right-hand, bright-finish NPT pipe thread in 1"-11-1/2 size with a semi-bottoming chamfer and five flutes for chip clearance.

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