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Metal tap tool with fluted shaft and threaded tip

MIBRO

MIBRO 789147 1/4 - 18 NPT Plug Tap pneumatic accessory

SKU CH-K7C2-CGY4F

A 1/4 - 18 NPT plug tap for cutting internal threads in pipe, made from carbon tool steel with four flutes for chip clearance and a permanently marked drill size

  • Cuts precise internal threads with 1/4 - 18 NPT sizing
  • Carbon tool steel construction resists rust and tarnish
  • Four-flute design clears chips efficiently during tapping
  • Right-hand threads offered in plug, taper and bottoming styles
  • Drill size marked on each tap for quick reference

Professional Thread Cutting Tool

The MIBRO 789147 is a 1/4 - 18 NPT plug tap designed for cutting precise internal threads in pipe fittings. It serves mechanics and fabricators who need reliable pipe-thread creation in workshop or field environments. Carbon tool steel construction provides the hardness required for clean cuts in metal materials.

Durable Carbon Steel Performance

Tough carbon tool steel resists rust and tarnish to maintain cutting edges over repeated use. Four flutes give extra chip clearance that reduces binding and keeps the tap running smoothly through the workpiece. Standard plug geometry suits general-purpose threading tasks without specialised cooling or lubrication requirements.

Upgrade From Worn Or Basic Taps

This tap replaces dull or damaged threading tools that produce ragged threads and leak paths. The permanently marked drill size eliminates guesswork and speeds setup for each job. The jump is worthwhile when existing taps no longer start true or when a rust-resistant, multi-flute design cuts downtime on pipe-work assemblies.

How it compares

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

Price $3.99
Cheaper than about 96% of the 5,493 comparable items (median $27.99).

Specifications

No published specifications for this item yet.

Questions about this item

How do I install the 1/4 - 18 NPT plug tap in a drilled hole?

Drill the correct hole size marked on the tap, apply cutting fluid, start the tap square to the workpiece, and turn clockwise with steady pressure while backing off every half-turn to break chips.

When will the carbon tool steel tap need replacement?

Replace the tap when threads cut become undersized or rough, flutes load up despite clearing, or the cutting edges show visible wear or chipping after extended use.

What limits sustained threading with this four-flute tap?

Chip packing in deep holes eventually restricts flute clearance, increasing torque and heat until thread quality drops or the tap binds and risks breakage.

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