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Bright steel pipe tap with four straight flutes and tapered threads

Westward

Westward 5TWT8 Pipe Tap 1/4"-18 NPT Semi-Bottoming 4 Flutes

SKU CH-X852-JJJJJ

Cuts 1/4"-18 NPT threads with a four-flute, semi-bottoming high-speed steel design

  • Product typeHole, Drill, Bore & Wire Gauges
  • 1/4"-18 NPT threads for standard pipe connections
  • Semi-bottoming design reaches full depth in blind holes
  • Four flutes clear chips efficiently during tapping
  • High-speed steel construction resists wear in repeated use
  • Bright uncoated finish suits general-purpose threading tasks

1/4"-18 NPT Pipe Tap

This Westward pipe tap cuts internal National Pipe Taper threads in a 1/4"-18 size. The semi-bottoming design allows threading close to the bottom of a blind hole. Four flutes provide efficient chip evacuation during the tapping process. It is intended for plumbers, pipefitters and maintenance technicians who need to create or repair tapered pipe threads.

High-Speed Steel Threading Tool

The tap is manufactured from high-speed steel with a bright, uncoated finish. A right-hand thread direction matches standard pipe fittings. The 75 percent thread drill size of .4375 in guides the required pre-drill diameter. Class 3B fit ensures a precise thread tolerance for pressure-tight joints in fluid or gas systems.

Four-Flute Semi-Bottoming Geometry

The 4-flute configuration distributes cutting load evenly for smoother thread finishes in materials such as steel, brass or cast iron. Semi-bottoming chamfer lets the tool start threads easily while reaching near the base of a hole. Overall length of 2 7/16 in with a 1 1/16 in thread length suits standard pipe-tapping applications. Builders needing larger diameters or different thread standards will require other tooling.

How it compares

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

Price $11.99
Cheaper 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 deep can the 1/4"-18 NPT semi-bottoming tap cut before the 1 1/16 in thread length is reached?

The tap provides a 1 1/16 in thread length, which is the maximum depth for full thread engagement.

Does the high-speed steel tap generate excessive heat during extended threading of 1/4"-18 NPT holes?

High-speed steel construction resists heat buildup during sustained cutting of NPT threads.

What drill size must I have on hand to prepare the 75 percent thread hole for this 1/4"-18 NPT tap?

A 0.4375 in drill bit is required to create the correct 75 percent thread hole size.

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