We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Bright steel pipe tap with five flutes and tapered threads

Westward

Westward 5TWU3 Pipe Tap 1-1/4"-11-1/2 NPT 5 Flutes

SKU CH-NZMC-1RMXA

Cuts 1-1/4" NPT threads with five flutes for clean, accurate pipe tapping

  • Product typeHole, Drill, Bore & Wire Gauges
  • Cuts precise NPT threads with 5-flute high-speed steel
  • 75 percent thread engagement from 1.4844 in drill size
  • Right-hand taper design starts cleanly in 1-1/4 in pipe
  • Bright uncoated finish resists galling during threading
  • 11 threads per inch matches standard NPT specification

Westward 1-1/4" NPT Pipe Tap

The Westward 5TWU3 is a taper pipe tap designed for cutting 1-1/4"-11-1/2 NPT threads in pipe and conduit. It suits plumbers and maintenance technicians who need to create new internal threads or repair damaged ones in the field or workshop. The right-hand cutting direction follows standard threading practice.

High-Speed Steel Construction

Made from bright, uncoated high-speed steel, the tap resists wear during hand or machine threading operations. The five-flute design helps distribute cutting forces evenly across the thread length of 1 3/4 inches. This geometry supports smoother chip evacuation and reduces the risk of tap breakage under load.

Class 3B Fit with 5 Flutes

The tap produces a Class 3B fit using a 75 percent thread drill size of 1.4844 inches for the pilot hole. Its overall length of 4 inches provides adequate reach for standard pipe coupling depths. The NPT taper ensures a sealing thread profile without requiring separate sealant for many applications.

How it compares

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

Price $111.99
Pricier than about 87% of the 2,474 comparable items (median $23.99).

Specifications

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

Questions about this item

How do I install the 1-1/4"-11-1/2 NPT pipe tap and what step is often missed?

Use a 1.4844 in drill for the 75 percent thread hole, apply cutting fluid, start the taper tap square to the workpiece and run it to the 1 3/4 in thread length; the step most often missed is checking alignment before the first full turn.

What maintenance or replacement will this 5-flute high-speed steel tap need later?

The bright uncoated flutes dull with use; resharpen or replace the tap when thread quality drops or cutting torque rises sharply.

What limit appears first when tapping 1-1/4" NPT holes continuously?

Heat buildup in the high-speed steel body and flute loading from chip evacuation become the limiting factors during sustained threading.

More in Utility & Specialty Hand Tools

Similar items